Finding the Fourth Proportional to 2,520.78, 3,478.71 and 1,401.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.78 : 3,478.71 = 1,401.73 : x
2. Step 2: Convert to fraction form
   2,520.78/3,478.71 = 1,401.73/x
3. Step 3: Cross multiply
   2,520.78x = 3,478.71 × 1,401.73
4. Step 4: Simplify right side
   2,520.78x = 4,876,212.17
5. Step 5: Solve for x
   x = 4,876,212.17/2,520.78
6. Step 6: Final answer
   x = 1,934.41