Finding the Fourth Proportional to 1,123.34, 1,687.70 and 1,061.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.34 : 1,687.70 = 1,061.17 : x
2. Step 2: Convert to fraction form
   1,123.34/1,687.70 = 1,061.17/x
3. Step 3: Cross multiply
   1,123.34x = 1,687.70 × 1,061.17
4. Step 4: Simplify right side
   1,123.34x = 1,790,935.04
5. Step 5: Solve for x
   x = 1,790,935.04/1,123.34
6. Step 6: Final answer
   x = 1,594.30