Finding the Fourth Proportional to 124,005.78, 170,824.28 and 89,914.10

Step by Step Solution

1. Step 1: Write the proportion equation
   124,005.78 : 170,824.28 = 89,914.10 : x
2. Step 2: Convert to fraction form
   124,005.78/170,824.28 = 89,914.10/x
3. Step 3: Cross multiply
   124,005.78x = 170,824.28 × 89,914.10
4. Step 4: Simplify right side
   124,005.78x = 15,359,510,090.66
5. Step 5: Solve for x
   x = 15,359,510,090.66/124,005.78
6. Step 6: Final answer
   x = 123,861.24