Finding the Fourth Proportional to 1,399.87, 1,932.62 and 903.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.87 : 1,932.62 = 903.24 : x
2. Step 2: Convert to fraction form
   1,399.87/1,932.62 = 903.24/x
3. Step 3: Cross multiply
   1,399.87x = 1,932.62 × 903.24
4. Step 4: Simplify right side
   1,399.87x = 1,745,619.69
5. Step 5: Solve for x
   x = 1,745,619.69/1,399.87
6. Step 6: Final answer
   x = 1,246.99