Finding the Fourth Proportional to 1,129.32, 1,558.74 and 731.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.32 : 1,558.74 = 731.42 : x
2. Step 2: Convert to fraction form
   1,129.32/1,558.74 = 731.42/x
3. Step 3: Cross multiply
   1,129.32x = 1,558.74 × 731.42
4. Step 4: Simplify right side
   1,129.32x = 1,140,093.61
5. Step 5: Solve for x
   x = 1,140,093.61/1,129.32
6. Step 6: Final answer
   x = 1,009.54