Finding the Fourth Proportional to 2,653.76, 3,980.12 and 2,522.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.76 : 3,980.12 = 2,522.05 : x
2. Step 2: Convert to fraction form
   2,653.76/3,980.12 = 2,522.05/x
3. Step 3: Cross multiply
   2,653.76x = 3,980.12 × 2,522.05
4. Step 4: Simplify right side
   2,653.76x = 10,038,039.09
5. Step 5: Solve for x
   x = 10,038,039.09/2,653.76
6. Step 6: Final answer
   x = 3,782.58