Finding the Fourth Proportional to 1,086.47, 1,499.31 and 614.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.47 : 1,499.31 = 614.39 : x
2. Step 2: Convert to fraction form
   1,086.47/1,499.31 = 614.39/x
3. Step 3: Cross multiply
   1,086.47x = 1,499.31 × 614.39
4. Step 4: Simplify right side
   1,086.47x = 921,161.07
5. Step 5: Solve for x
   x = 921,161.07/1,086.47
6. Step 6: Final answer
   x = 847.85