Finding the Fourth Proportional to 1,116.17, 1,673.69 and 654.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.17 : 1,673.69 = 654.09 : x
2. Step 2: Convert to fraction form
   1,116.17/1,673.69 = 654.09/x
3. Step 3: Cross multiply
   1,116.17x = 1,673.69 × 654.09
4. Step 4: Simplify right side
   1,116.17x = 1,094,743.89
5. Step 5: Solve for x
   x = 1,094,743.89/1,116.17
6. Step 6: Final answer
   x = 980.80