Finding the Fourth Proportional to 101,140.86, 139,571.76 and 55,818.24

Step by Step Solution

1. Step 1: Write the proportion equation
   101,140.86 : 139,571.76 = 55,818.24 : x
2. Step 2: Convert to fraction form
   101,140.86/139,571.76 = 55,818.24/x
3. Step 3: Cross multiply
   101,140.86x = 139,571.76 × 55,818.24
4. Step 4: Simplify right side
   101,140.86x = 7,790,649,996.90
5. Step 5: Solve for x
   x = 7,790,649,996.90/101,140.86
6. Step 6: Final answer
   x = 77,027.72