Finding the Fourth Proportional to 57,070.36, 78,752.82 and 31,915

Step by Step Solution

1. Step 1: Write the proportion equation
   57,070.36 : 78,752.82 = 31,915 : x
2. Step 2: Convert to fraction form
   57,070.36/78,752.82 = 31,915/x
3. Step 3: Cross multiply
   57,070.36x = 78,752.82 × 31,915
4. Step 4: Simplify right side
   57,070.36x = 2,513,396,250.30
5. Step 5: Solve for x
   x = 2,513,396,250.30/57,070.36
6. Step 6: Final answer
   x = 44,040.31