Finding the Fourth Proportional to 101,009.29, 139,393.77 and 55,688.86

Step by Step Solution

1. Step 1: Write the proportion equation
   101,009.29 : 139,393.77 = 55,688.86 : x
2. Step 2: Convert to fraction form
   101,009.29/139,393.77 = 55,688.86/x
3. Step 3: Cross multiply
   101,009.29x = 139,393.77 × 55,688.86
4. Step 4: Simplify right side
   101,009.29x = 7,762,680,142.40
5. Step 5: Solve for x
   x = 7,762,680,142.40/101,009.29
6. Step 6: Final answer
   x = 76,851.15