Finding the Fourth Proportional to 57,481.20, 86,061.60 and 29,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,481.20 : 86,061.60 = 29,340.72 : x
2. Step 2: Convert to fraction form
   57,481.20/86,061.60 = 29,340.72/x
3. Step 3: Cross multiply
   57,481.20x = 86,061.60 × 29,340.72
4. Step 4: Simplify right side
   57,481.20x = 2,525,109,308.35
5. Step 5: Solve for x
   x = 2,525,109,308.35/57,481.20
6. Step 6: Final answer
   x = 43,929.31