Finding the Fourth Proportional to 123,765.52, 170,800.24 and 72,769

Step by Step Solution

1. Step 1: Write the proportion equation
   123,765.52 : 170,800.24 = 72,769 : x
2. Step 2: Convert to fraction form
   123,765.52/170,800.24 = 72,769/x
3. Step 3: Cross multiply
   123,765.52x = 170,800.24 × 72,769
4. Step 4: Simplify right side
   123,765.52x = 12,428,962,664.56
5. Step 5: Solve for x
   x = 12,428,962,664.56/123,765.52
6. Step 6: Final answer
   x = 100,423.47