Finding the Fourth Proportional to 2,520.61, 3,478.38 and 1,401.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.61 : 3,478.38 = 1,401.55 : x
2. Step 2: Convert to fraction form
   2,520.61/3,478.38 = 1,401.55/x
3. Step 3: Cross multiply
   2,520.61x = 3,478.38 × 1,401.55
4. Step 4: Simplify right side
   2,520.61x = 4,875,123.49
5. Step 5: Solve for x
   x = 4,875,123.49/2,520.61
6. Step 6: Final answer
   x = 1,934.10