Finding the Fourth Proportional to 1,356.52, 1,872.30 and 1,123.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.52 : 1,872.30 = 1,123.24 : x
2. Step 2: Convert to fraction form
   1,356.52/1,872.30 = 1,123.24/x
3. Step 3: Cross multiply
   1,356.52x = 1,872.30 × 1,123.24
4. Step 4: Simplify right side
   1,356.52x = 2,103,042.25
5. Step 5: Solve for x
   x = 2,103,042.25/1,356.52
6. Step 6: Final answer
   x = 1,550.32