Finding the Fourth Proportional to 124,911.81, 172,123.25 and 89,025.57

Step by Step Solution

1. Step 1: Write the proportion equation
   124,911.81 : 172,123.25 = 89,025.57 : x
2. Step 2: Convert to fraction form
   124,911.81/172,123.25 = 89,025.57/x
3. Step 3: Cross multiply
   124,911.81x = 172,123.25 × 89,025.57
4. Step 4: Simplify right side
   124,911.81x = 15,323,369,996.37
5. Step 5: Solve for x
   x = 15,323,369,996.37/124,911.81
6. Step 6: Final answer
   x = 122,673.51