Finding the Fourth Proportional to 57,105.76, 78,804.24 and 31,613.20

Step by Step Solution

1. Step 1: Write the proportion equation
   57,105.76 : 78,804.24 = 31,613.20 : x
2. Step 2: Convert to fraction form
   57,105.76/78,804.24 = 31,613.20/x
3. Step 3: Cross multiply
   57,105.76x = 78,804.24 × 31,613.20
4. Step 4: Simplify right side
   57,105.76x = 2,491,254,199.97
5. Step 5: Solve for x
   x = 2,491,254,199.97/57,105.76
6. Step 6: Final answer
   x = 43,625.27