Finding the Fourth Proportional to 1,086.99, 1,499.67 and 694.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.99 : 1,499.67 = 694.23 : x
2. Step 2: Convert to fraction form
   1,086.99/1,499.67 = 694.23/x
3. Step 3: Cross multiply
   1,086.99x = 1,499.67 × 694.23
4. Step 4: Simplify right side
   1,086.99x = 1,041,115.90
5. Step 5: Solve for x
   x = 1,041,115.90/1,086.99
6. Step 6: Final answer
   x = 957.80