Finding the Fourth Proportional to 2,738.78, 4,101.98 and 1,920.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.78 : 4,101.98 = 1,920.71 : x
2. Step 2: Convert to fraction form
   2,738.78/4,101.98 = 1,920.71/x
3. Step 3: Cross multiply
   2,738.78x = 4,101.98 × 1,920.71
4. Step 4: Simplify right side
   2,738.78x = 7,878,693.50
5. Step 5: Solve for x
   x = 7,878,693.50/2,738.78
6. Step 6: Final answer
   x = 2,876.72