Finding the Fourth Proportional to 2,520.94, 3,478.54 and 1,401.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.94 : 3,478.54 = 1,401.90 : x
2. Step 2: Convert to fraction form
   2,520.94/3,478.54 = 1,401.90/x
3. Step 3: Cross multiply
   2,520.94x = 3,478.54 × 1,401.90
4. Step 4: Simplify right side
   2,520.94x = 4,876,565.23
5. Step 5: Solve for x
   x = 4,876,565.23/2,520.94
6. Step 6: Final answer
   x = 1,934.42