Finding the Fourth Proportional to 2,520.99, 3,477.20 and 1,681.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.99 : 3,477.20 = 1,681.43 : x
2. Step 2: Convert to fraction form
   2,520.99/3,477.20 = 1,681.43/x
3. Step 3: Cross multiply
   2,520.99x = 3,477.20 × 1,681.43
4. Step 4: Simplify right side
   2,520.99x = 5,846,642.60
5. Step 5: Solve for x
   x = 5,846,642.60/2,520.99
6. Step 6: Final answer
   x = 2,319.19