Finding the Fourth Proportional to 1,086.15, 1,498.32 and 961.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.15 : 1,498.32 = 961.83 : x
2. Step 2: Convert to fraction form
   1,086.15/1,498.32 = 961.83/x
3. Step 3: Cross multiply
   1,086.15x = 1,498.32 × 961.83
4. Step 4: Simplify right side
   1,086.15x = 1,441,129.13
5. Step 5: Solve for x
   x = 1,441,129.13/1,086.15
6. Step 6: Final answer
   x = 1,326.82