Finding the Fourth Proportional to 101,435.06, 139,988.98 and 56,124.06

Step by Step Solution

1. Step 1: Write the proportion equation
   101,435.06 : 139,988.98 = 56,124.06 : x
2. Step 2: Convert to fraction form
   101,435.06/139,988.98 = 56,124.06/x
3. Step 3: Cross multiply
   101,435.06x = 139,988.98 × 56,124.06
4. Step 4: Simplify right side
   101,435.06x = 7,856,749,912.86
5. Step 5: Solve for x
   x = 7,856,749,912.86/101,435.06
6. Step 6: Final answer
   x = 77,455.96