Finding the Fourth Proportional to 101,256.60, 139,710.24 and 58,789.92

Step by Step Solution

1. Step 1: Write the proportion equation
   101,256.60 : 139,710.24 = 58,789.92 : x
2. Step 2: Convert to fraction form
   101,256.60/139,710.24 = 58,789.92/x
3. Step 3: Cross multiply
   101,256.60x = 139,710.24 × 58,789.92
4. Step 4: Simplify right side
   101,256.60x = 8,213,553,832.78
5. Step 5: Solve for x
   x = 8,213,553,832.78/101,256.60
6. Step 6: Final answer
   x = 81,116.23