Finding the Fourth Proportional to 1,086.04, 1,498.56 and 613.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.04 : 1,498.56 = 613.92 : x
2. Step 2: Convert to fraction form
   1,086.04/1,498.56 = 613.92/x
3. Step 3: Cross multiply
   1,086.04x = 1,498.56 × 613.92
4. Step 4: Simplify right side
   1,086.04x = 919,995.96
5. Step 5: Solve for x
   x = 919,995.96/1,086.04
6. Step 6: Final answer
   x = 847.11