Finding the Fourth Proportional to 71,586.72, 98,786.52 and 39,753.12

Step by Step Solution

1. Step 1: Write the proportion equation
   71,586.72 : 98,786.52 = 39,753.12 : x
2. Step 2: Convert to fraction form
   71,586.72/98,786.52 = 39,753.12/x
3. Step 3: Cross multiply
   71,586.72x = 98,786.52 × 39,753.12
4. Step 4: Simplify right side
   71,586.72x = 3,927,072,383.94
5. Step 5: Solve for x
   x = 3,927,072,383.94/71,586.72
6. Step 6: Final answer
   x = 54,857.55