Finding the Fourth Proportional to 3,640.72, 5,023.76 and 2,068.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,640.72 : 5,023.76 = 2,068.80 : x
2. Step 2: Convert to fraction form
   3,640.72/5,023.76 = 2,068.80/x
3. Step 3: Cross multiply
   3,640.72x = 5,023.76 × 2,068.80
4. Step 4: Simplify right side
   3,640.72x = 10,393,154.69
5. Step 5: Solve for x
   x = 10,393,154.69/3,640.72
6. Step 6: Final answer
   x = 2,854.70