Finding the Fourth Proportional to 1,087.39, 1,499.88 and 694.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.39 : 1,499.88 = 694.90 : x
2. Step 2: Convert to fraction form
   1,087.39/1,499.88 = 694.90/x
3. Step 3: Cross multiply
   1,087.39x = 1,499.88 × 694.90
4. Step 4: Simplify right side
   1,087.39x = 1,042,266.61
5. Step 5: Solve for x
   x = 1,042,266.61/1,087.39
6. Step 6: Final answer
   x = 958.50