Finding the Fourth Proportional to 1,123.64, 1,691.52 and 1,010.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.64 : 1,691.52 = 1,010.61 : x
2. Step 2: Convert to fraction form
   1,123.64/1,691.52 = 1,010.61/x
3. Step 3: Cross multiply
   1,123.64x = 1,691.52 × 1,010.61
4. Step 4: Simplify right side
   1,123.64x = 1,709,473.78
5. Step 5: Solve for x
   x = 1,709,473.78/1,123.64
6. Step 6: Final answer
   x = 1,521.37