Finding the Fourth Proportional to 1,116.18, 1,674.86 and 653.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.18 : 1,674.86 = 653.96 : x
2. Step 2: Convert to fraction form
   1,116.18/1,674.86 = 653.96/x
3. Step 3: Cross multiply
   1,116.18x = 1,674.86 × 653.96
4. Step 4: Simplify right side
   1,116.18x = 1,095,279.80
5. Step 5: Solve for x
   x = 1,095,279.80/1,116.18
6. Step 6: Final answer
   x = 981.28