Finding the Fourth Proportional to 124,978.74, 172,291.23 and 89,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   124,978.74 : 172,291.23 = 89,106.50 : x
2. Step 2: Convert to fraction form
   124,978.74/172,291.23 = 89,106.50/x
3. Step 3: Cross multiply
   124,978.74x = 172,291.23 × 89,106.50
4. Step 4: Simplify right side
   124,978.74x = 15,352,267,624.54
5. Step 5: Solve for x
   x = 15,352,267,624.54/124,978.74
6. Step 6: Final answer
   x = 122,839.03