Finding the Fourth Proportional to 101,610.88, 140,221.55 and 56,288.79

Step by Step Solution

1. Step 1: Write the proportion equation
   101,610.88 : 140,221.55 = 56,288.79 : x
2. Step 2: Convert to fraction form
   101,610.88/140,221.55 = 56,288.79/x
3. Step 3: Cross multiply
   101,610.88x = 140,221.55 × 56,288.79
4. Step 4: Simplify right side
   101,610.88x = 7,892,901,522.15
5. Step 5: Solve for x
   x = 7,892,901,522.15/101,610.88
6. Step 6: Final answer
   x = 77,677.72