Finding the Fourth Proportional to 1,123.23, 1,687.49 and 1,061.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.23 : 1,687.49 = 1,061.07 : x
2. Step 2: Convert to fraction form
   1,123.23/1,687.49 = 1,061.07/x
3. Step 3: Cross multiply
   1,123.23x = 1,687.49 × 1,061.07
4. Step 4: Simplify right side
   1,123.23x = 1,790,539.71
5. Step 5: Solve for x
   x = 1,790,539.71/1,123.23
6. Step 6: Final answer
   x = 1,594.10