Finding the Fourth Proportional to 1,611.55, 2,223.42 and 903.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.55 : 2,223.42 = 903.29 : x
2. Step 2: Convert to fraction form
   1,611.55/2,223.42 = 903.29/x
3. Step 3: Cross multiply
   1,611.55x = 2,223.42 × 903.29
4. Step 4: Simplify right side
   1,611.55x = 2,008,398.61
5. Step 5: Solve for x
   x = 2,008,398.61/1,611.55
6. Step 6: Final answer
   x = 1,246.25