Finding the Fourth Proportional to 42,849,131.18, 64,265,103.40 and 20,980,087.99

Step by Step Solution

1. Step 1: Write the proportion equation
   42,849,131.18 : 64,265,103.40 = 20,980,087.99 : x
2. Step 2: Convert to fraction form
   42,849,131.18/64,265,103.40 = 20,980,087.99/x
3. Step 3: Cross multiply
   42,849,131.18x = 64,265,103.40 × 20,980,087.99
4. Step 4: Simplify right side
   42,849,131.18x = 1,348,287,523,966,411.25
5. Step 5: Solve for x
   x = 1,348,287,523,966,411.25/42,849,131.18
6. Step 6: Final answer
   x = 31,465,924.44