Finding the Fourth Proportional to 1,116.42, 1,540.82 and 697.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.42 : 1,540.82 = 697.20 : x
2. Step 2: Convert to fraction form
   1,116.42/1,540.82 = 697.20/x
3. Step 3: Cross multiply
   1,116.42x = 1,540.82 × 697.20
4. Step 4: Simplify right side
   1,116.42x = 1,074,259.70
5. Step 5: Solve for x
   x = 1,074,259.70/1,116.42
6. Step 6: Final answer
   x = 962.24