Finding the Fourth Proportional to 2,520.85, 3,478.81 and 1,401.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.85 : 3,478.81 = 1,401.86 : x
2. Step 2: Convert to fraction form
   2,520.85/3,478.81 = 1,401.86/x
3. Step 3: Cross multiply
   2,520.85x = 3,478.81 × 1,401.86
4. Step 4: Simplify right side
   2,520.85x = 4,876,804.59
5. Step 5: Solve for x
   x = 4,876,804.59/2,520.85
6. Step 6: Final answer
   x = 1,934.59