Finding the Fourth Proportional to 1,116.78, 1,541.06 and 674.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.78 : 1,541.06 = 674.52 : x
2. Step 2: Convert to fraction form
   1,116.78/1,541.06 = 674.52/x
3. Step 3: Cross multiply
   1,116.78x = 1,541.06 × 674.52
4. Step 4: Simplify right side
   1,116.78x = 1,039,475.79
5. Step 5: Solve for x
   x = 1,039,475.79/1,116.78
6. Step 6: Final answer
   x = 930.78