Finding the Fourth Proportional to 101,007.79, 139,390.18 and 55,685.61

Step by Step Solution

1. Step 1: Write the proportion equation
   101,007.79 : 139,390.18 = 55,685.61 : x
2. Step 2: Convert to fraction form
   101,007.79/139,390.18 = 55,685.61/x
3. Step 3: Cross multiply
   101,007.79x = 139,390.18 × 55,685.61
4. Step 4: Simplify right side
   101,007.79x = 7,762,027,062.10
5. Step 5: Solve for x
   x = 7,762,027,062.10/101,007.79
6. Step 6: Final answer
   x = 76,845.83