Finding the Fourth Proportional to 101,488.18, 140,053.96 and 56,169.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,488.18 : 140,053.96 = 56,169.30 : x
2. Step 2: Convert to fraction form
   101,488.18/140,053.96 = 56,169.30/x
3. Step 3: Cross multiply
   101,488.18x = 140,053.96 × 56,169.30
4. Step 4: Simplify right side
   101,488.18x = 7,866,732,895.43
5. Step 5: Solve for x
   x = 7,866,732,895.43/101,488.18
6. Step 6: Final answer
   x = 77,513.78