Finding the Fourth Proportional to 1,086.01, 1,498.62 and 613.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.01 : 1,498.62 = 613.89 : x
2. Step 2: Convert to fraction form
   1,086.01/1,498.62 = 613.89/x
3. Step 3: Cross multiply
   1,086.01x = 1,498.62 × 613.89
4. Step 4: Simplify right side
   1,086.01x = 919,987.83
5. Step 5: Solve for x
   x = 919,987.83/1,086.01
6. Step 6: Final answer
   x = 847.13