Finding the Fourth Proportional to 1,158.47, 1,738.31 and 610.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.47 : 1,738.31 = 610.70 : x
2. Step 2: Convert to fraction form
   1,158.47/1,738.31 = 610.70/x
3. Step 3: Cross multiply
   1,158.47x = 1,738.31 × 610.70
4. Step 4: Simplify right side
   1,158.47x = 1,061,585.92
5. Step 5: Solve for x
   x = 1,061,585.92/1,158.47
6. Step 6: Final answer
   x = 916.37