Finding the Fourth Proportional to 28,107,995,365.99, 42,168,971,326.27 and 13,949,605,978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   28,107,995,365.99 : 42,168,971,326.27 = 13,949,605,978.68 : x
2. Step 2: Convert to fraction form
   28,107,995,365.99/42,168,971,326.27 = 13,949,605,978.68/x
3. Step 3: Cross multiply
   28,107,995,365.99x = 42,168,971,326.27 × 13,949,605,978.68
4. Step 4: Simplify right side
   28,107,995,365.99x = 588,240,534,527,693,357,056
5. Step 5: Solve for x
   x = 588,240,534,527,693,357,056/28,107,995,365.99
6. Step 6: Final answer
   x = 20,927,872,189.69