Finding the Fourth Proportional to 2,554.56, 3,522.42 and 1,807.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,554.56 : 3,522.42 = 1,807.20 : x
2. Step 2: Convert to fraction form
   2,554.56/3,522.42 = 1,807.20/x
3. Step 3: Cross multiply
   2,554.56x = 3,522.42 × 1,807.20
4. Step 4: Simplify right side
   2,554.56x = 6,365,717.42
5. Step 5: Solve for x
   x = 6,365,717.42/2,554.56
6. Step 6: Final answer
   x = 2,491.90