Finding the Fourth Proportional to 1,399.03, 1,931.95 and 902.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.03 : 1,931.95 = 902.53 : x
2. Step 2: Convert to fraction form
   1,399.03/1,931.95 = 902.53/x
3. Step 3: Cross multiply
   1,399.03x = 1,931.95 × 902.53
4. Step 4: Simplify right side
   1,399.03x = 1,743,642.83
5. Step 5: Solve for x
   x = 1,743,642.83/1,399.03
6. Step 6: Final answer
   x = 1,246.32