Finding the Fourth Proportional to 1,086.86, 1,499.90 and 614.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.86 : 1,499.90 = 614.77 : x
2. Step 2: Convert to fraction form
   1,086.86/1,499.90 = 614.77/x
3. Step 3: Cross multiply
   1,086.86x = 1,499.90 × 614.77
4. Step 4: Simplify right side
   1,086.86x = 922,093.52
5. Step 5: Solve for x
   x = 922,093.52/1,086.86
6. Step 6: Final answer
   x = 848.40