Finding the Fourth Proportional to 1,086.17, 1,499.67 and 837.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.17 : 1,499.67 = 837.09 : x
2. Step 2: Convert to fraction form
   1,086.17/1,499.67 = 837.09/x
3. Step 3: Cross multiply
   1,086.17x = 1,499.67 × 837.09
4. Step 4: Simplify right side
   1,086.17x = 1,255,358.76
5. Step 5: Solve for x
   x = 1,255,358.76/1,086.17
6. Step 6: Final answer
   x = 1,155.77