Finding the Fourth Proportional to 2,522.20, 3,479.32 and 1,638.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.20 : 3,479.32 = 1,638.48 : x
2. Step 2: Convert to fraction form
   2,522.20/3,479.32 = 1,638.48/x
3. Step 3: Cross multiply
   2,522.20x = 3,479.32 × 1,638.48
4. Step 4: Simplify right side
   2,522.20x = 5,700,796.23
5. Step 5: Solve for x
   x = 5,700,796.23/2,522.20
6. Step 6: Final answer
   x = 2,260.25