Finding the Fourth Proportional to 1,116.58, 1,541.16 and 674.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.58 : 1,541.16 = 674.78 : x
2. Step 2: Convert to fraction form
   1,116.58/1,541.16 = 674.78/x
3. Step 3: Cross multiply
   1,116.58x = 1,541.16 × 674.78
4. Step 4: Simplify right side
   1,116.58x = 1,039,943.94
5. Step 5: Solve for x
   x = 1,039,943.94/1,116.58
6. Step 6: Final answer
   x = 931.37