Finding the Fourth Proportional to 1,116.20, 1,540.28 and 655.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.20 : 1,540.28 = 655.89 : x
2. Step 2: Convert to fraction form
   1,116.20/1,540.28 = 655.89/x
3. Step 3: Cross multiply
   1,116.20x = 1,540.28 × 655.89
4. Step 4: Simplify right side
   1,116.20x = 1,010,254.25
5. Step 5: Solve for x
   x = 1,010,254.25/1,116.20
6. Step 6: Final answer
   x = 905.08