Finding the Fourth Proportional to 1,543.52, 2,129.14 and 1,123.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.52 : 2,129.14 = 1,123.31 : x
2. Step 2: Convert to fraction form
   1,543.52/2,129.14 = 1,123.31/x
3. Step 3: Cross multiply
   1,543.52x = 2,129.14 × 1,123.31
4. Step 4: Simplify right side
   1,543.52x = 2,391,684.25
5. Step 5: Solve for x
   x = 2,391,684.25/1,543.52
6. Step 6: Final answer
   x = 1,549.50