Finding the Fourth Proportional to 124,978.24, 172,290.54 and 89,106

Step by Step Solution

1. Step 1: Write the proportion equation
   124,978.24 : 172,290.54 = 89,106 : x
2. Step 2: Convert to fraction form
   124,978.24/172,290.54 = 89,106/x
3. Step 3: Cross multiply
   124,978.24x = 172,290.54 × 89,106
4. Step 4: Simplify right side
   124,978.24x = 15,352,120,857.24
5. Step 5: Solve for x
   x = 15,352,120,857.24/124,978.24
6. Step 6: Final answer
   x = 122,838.35