Finding the Fourth Proportional to 1,086.41, 1,499.28 and 614.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.41 : 1,499.28 = 614.39 : x
2. Step 2: Convert to fraction form
   1,086.41/1,499.28 = 614.39/x
3. Step 3: Cross multiply
   1,086.41x = 1,499.28 × 614.39
4. Step 4: Simplify right side
   1,086.41x = 921,142.64
5. Step 5: Solve for x
   x = 921,142.64/1,086.41
6. Step 6: Final answer
   x = 847.88