Finding the Fourth Proportional to 2,680.60, 4,023.78 and 1,381.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.60 : 4,023.78 = 1,381.72 : x
2. Step 2: Convert to fraction form
   2,680.60/4,023.78 = 1,381.72/x
3. Step 3: Cross multiply
   2,680.60x = 4,023.78 × 1,381.72
4. Step 4: Simplify right side
   2,680.60x = 5,559,737.30
5. Step 5: Solve for x
   x = 5,559,737.30/2,680.60
6. Step 6: Final answer
   x = 2,074.06