Finding the Fourth Proportional to 42,686,978.40, 64,020,884.40 and 19,635,774.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,686,978.40 : 64,020,884.40 = 19,635,774.24 : x
2. Step 2: Convert to fraction form
   42,686,978.40/64,020,884.40 = 19,635,774.24/x
3. Step 3: Cross multiply
   42,686,978.40x = 64,020,884.40 × 19,635,774.24
4. Step 4: Simplify right side
   42,686,978.40x = 1,257,099,632,723,537.75
5. Step 5: Solve for x
   x = 1,257,099,632,723,537.75/42,686,978.40
6. Step 6: Final answer
   x = 29,449,253.14