Finding the Fourth Proportional to 101,185.20, 139,637.52 and 58,728.24

Step by Step Solution

1. Step 1: Write the proportion equation
   101,185.20 : 139,637.52 = 58,728.24 : x
2. Step 2: Convert to fraction form
   101,185.20/139,637.52 = 58,728.24/x
3. Step 3: Cross multiply
   101,185.20x = 139,637.52 × 58,728.24
4. Step 4: Simplify right side
   101,185.20x = 8,200,665,787.56
5. Step 5: Solve for x
   x = 8,200,665,787.56/101,185.20
6. Step 6: Final answer
   x = 81,046.10