Finding the Fourth Proportional to 42,561,553.52, 63,851,298.38 and 13,805,447.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,561,553.52 : 63,851,298.38 = 13,805,447.20 : x
2. Step 2: Convert to fraction form
   42,561,553.52/63,851,298.38 = 13,805,447.20/x
3. Step 3: Cross multiply
   42,561,553.52x = 63,851,298.38 × 13,805,447.20
4. Step 4: Simplify right side
   42,561,553.52x = 881,495,728,436,535.50
5. Step 5: Solve for x
   x = 881,495,728,436,535.50/42,561,553.52
6. Step 6: Final answer
   x = 20,711,079.73