Finding the Fourth Proportional to 101,443.59, 139,989.11 and 56,118.93

Step by Step Solution

1. Step 1: Write the proportion equation
   101,443.59 : 139,989.11 = 56,118.93 : x
2. Step 2: Convert to fraction form
   101,443.59/139,989.11 = 56,118.93/x
3. Step 3: Cross multiply
   101,443.59x = 139,989.11 × 56,118.93
4. Step 4: Simplify right side
   101,443.59x = 7,856,038,574.97
5. Step 5: Solve for x
   x = 7,856,038,574.97/101,443.59
6. Step 6: Final answer
   x = 77,442.43