Finding the Fourth Proportional to 1,086.79, 1,499.62 and 614.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.79 : 1,499.62 = 614.75 : x
2. Step 2: Convert to fraction form
   1,086.79/1,499.62 = 614.75/x
3. Step 3: Cross multiply
   1,086.79x = 1,499.62 × 614.75
4. Step 4: Simplify right side
   1,086.79x = 921,883.90
5. Step 5: Solve for x
   x = 921,883.90/1,086.79
6. Step 6: Final answer
   x = 848.27