Finding the Fourth Proportional to 1,087.50, 1,500.28 and 688.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.50 : 1,500.28 = 688.96 : x
2. Step 2: Convert to fraction form
   1,087.50/1,500.28 = 688.96/x
3. Step 3: Cross multiply
   1,087.50x = 1,500.28 × 688.96
4. Step 4: Simplify right side
   1,087.50x = 1,033,632.91
5. Step 5: Solve for x
   x = 1,033,632.91/1,087.50
6. Step 6: Final answer
   x = 950.47