Finding the Fourth Proportional to 1,087.91, 1,500.30 and 838.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.91 : 1,500.30 = 838.83 : x
2. Step 2: Convert to fraction form
   1,087.91/1,500.30 = 838.83/x
3. Step 3: Cross multiply
   1,087.91x = 1,500.30 × 838.83
4. Step 4: Simplify right side
   1,087.91x = 1,258,496.65
5. Step 5: Solve for x
   x = 1,258,496.65/1,087.91
6. Step 6: Final answer
   x = 1,156.80