Finding the Fourth Proportional to 2,520.63, 3,478.32 and 1,401.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.63 : 3,478.32 = 1,401.60 : x
2. Step 2: Convert to fraction form
   2,520.63/3,478.32 = 1,401.60/x
3. Step 3: Cross multiply
   2,520.63x = 3,478.32 × 1,401.60
4. Step 4: Simplify right side
   2,520.63x = 4,875,213.31
5. Step 5: Solve for x
   x = 4,875,213.31/2,520.63
6. Step 6: Final answer
   x = 1,934.12