Finding the Fourth Proportional to 1,124.91, 1,553.89 and 1,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.91 : 1,553.89 = 1,020.12 : x
2. Step 2: Convert to fraction form
   1,124.91/1,553.89 = 1,020.12/x
3. Step 3: Cross multiply
   1,124.91x = 1,553.89 × 1,020.12
4. Step 4: Simplify right side
   1,124.91x = 1,585,151.66
5. Step 5: Solve for x
   x = 1,585,151.66/1,124.91
6. Step 6: Final answer
   x = 1,409.13