Finding the Fourth Proportional to 1,087.20, 1,500.72 and 694.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.20 : 1,500.72 = 694.32 : x
2. Step 2: Convert to fraction form
   1,087.20/1,500.72 = 694.32/x
3. Step 3: Cross multiply
   1,087.20x = 1,500.72 × 694.32
4. Step 4: Simplify right side
   1,087.20x = 1,041,979.91
5. Step 5: Solve for x
   x = 1,041,979.91/1,087.20
6. Step 6: Final answer
   x = 958.41