Finding the Fourth Proportional to 1,123.65, 1,552.14 and 864.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.65 : 1,552.14 = 864.90 : x
2. Step 2: Convert to fraction form
   1,123.65/1,552.14 = 864.90/x
3. Step 3: Cross multiply
   1,123.65x = 1,552.14 × 864.90
4. Step 4: Simplify right side
   1,123.65x = 1,342,445.89
5. Step 5: Solve for x
   x = 1,342,445.89/1,123.65
6. Step 6: Final answer
   x = 1,194.72