Finding the Fourth Proportional to 89,838.10, 123,882.78 and 62,645.79

Step by Step Solution

1. Step 1: Write the proportion equation
   89,838.10 : 123,882.78 = 62,645.79 : x
2. Step 2: Convert to fraction form
   89,838.10/123,882.78 = 62,645.79/x
3. Step 3: Cross multiply
   89,838.10x = 123,882.78 × 62,645.79
4. Step 4: Simplify right side
   89,838.10x = 7,760,734,620.50
5. Step 5: Solve for x
   x = 7,760,734,620.50/89,838.10
6. Step 6: Final answer
   x = 86,385.78