Finding the Fourth Proportional to 101,012.32, 139,390.68 and 55,687.92

Step by Step Solution

1. Step 1: Write the proportion equation
   101,012.32 : 139,390.68 = 55,687.92 : x
2. Step 2: Convert to fraction form
   101,012.32/139,390.68 = 55,687.92/x
3. Step 3: Cross multiply
   101,012.32x = 139,390.68 × 55,687.92
4. Step 4: Simplify right side
   101,012.32x = 7,762,377,036.59
5. Step 5: Solve for x
   x = 7,762,377,036.59/101,012.32
6. Step 6: Final answer
   x = 76,845.84