Finding the Fourth Proportional to 1,046.58, 1,560.72 and 917.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.58 : 1,560.72 = 917.18 : x
2. Step 2: Convert to fraction form
   1,046.58/1,560.72 = 917.18/x
3. Step 3: Cross multiply
   1,046.58x = 1,560.72 × 917.18
4. Step 4: Simplify right side
   1,046.58x = 1,431,461.17
5. Step 5: Solve for x
   x = 1,431,461.17/1,046.58
6. Step 6: Final answer
   x = 1,367.75