Finding the Fourth Proportional to 1,086.15, 1,498.31 and 837.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.15 : 1,498.31 = 837.38 : x
2. Step 2: Convert to fraction form
   1,086.15/1,498.31 = 837.38/x
3. Step 3: Cross multiply
   1,086.15x = 1,498.31 × 837.38
4. Step 4: Simplify right side
   1,086.15x = 1,254,654.83
5. Step 5: Solve for x
   x = 1,254,654.83/1,086.15
6. Step 6: Final answer
   x = 1,155.14