Finding the Fourth Proportional to 3,608.80, 5,414.72 and 2,312.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,608.80 : 5,414.72 = 2,312.80 : x
2. Step 2: Convert to fraction form
   3,608.80/5,414.72 = 2,312.80/x
3. Step 3: Cross multiply
   3,608.80x = 5,414.72 × 2,312.80
4. Step 4: Simplify right side
   3,608.80x = 12,523,164.42
5. Step 5: Solve for x
   x = 12,523,164.42/3,608.80
6. Step 6: Final answer
   x = 3,470.17