Finding the Fourth Proportional to 124,996.08, 172,315.28 and 89,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   124,996.08 : 172,315.28 = 89,123.88 : x
2. Step 2: Convert to fraction form
   124,996.08/172,315.28 = 89,123.88/x
3. Step 3: Cross multiply
   124,996.08x = 172,315.28 × 89,123.88
4. Step 4: Simplify right side
   124,996.08x = 15,357,406,336.89
5. Step 5: Solve for x
   x = 15,357,406,336.89/124,996.08
6. Step 6: Final answer
   x = 122,863.10