Finding the Fourth Proportional to 2,540.61, 3,808.59 and 1,223.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.61 : 3,808.59 = 1,223.55 : x
2. Step 2: Convert to fraction form
   2,540.61/3,808.59 = 1,223.55/x
3. Step 3: Cross multiply
   2,540.61x = 3,808.59 × 1,223.55
4. Step 4: Simplify right side
   2,540.61x = 4,660,000.29
5. Step 5: Solve for x
   x = 4,660,000.29/2,540.61
6. Step 6: Final answer
   x = 1,834.21