Finding the Fourth Proportional to 1,086.57, 1,500.15 and 837.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.57 : 1,500.15 = 837.42 : x
2. Step 2: Convert to fraction form
   1,086.57/1,500.15 = 837.42/x
3. Step 3: Cross multiply
   1,086.57x = 1,500.15 × 837.42
4. Step 4: Simplify right side
   1,086.57x = 1,256,255.61
5. Step 5: Solve for x
   x = 1,256,255.61/1,086.57
6. Step 6: Final answer
   x = 1,156.17