Finding the Fourth Proportional to 57,205,057.50, 78,943,877.55 and 31,099,675.05

Step by Step Solution

1. Step 1: Write the proportion equation
   57,205,057.50 : 78,943,877.55 = 31,099,675.05 : x
2. Step 2: Convert to fraction form
   57,205,057.50/78,943,877.55 = 31,099,675.05/x
3. Step 3: Cross multiply
   57,205,057.50x = 78,943,877.55 × 31,099,675.05
4. Step 4: Simplify right side
   57,205,057.50x = 2,455,128,938,991,990
5. Step 5: Solve for x
   x = 2,455,128,938,991,990/57,205,057.50
6. Step 6: Final answer
   x = 42,918,039.88