Finding the Fourth Proportional to 2,455.47, 3,384.72 and 1,668.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,455.47 : 3,384.72 = 1,668.15 : x
2. Step 2: Convert to fraction form
   2,455.47/3,384.72 = 1,668.15/x
3. Step 3: Cross multiply
   2,455.47x = 3,384.72 × 1,668.15
4. Step 4: Simplify right side
   2,455.47x = 5,646,220.67
5. Step 5: Solve for x
   x = 5,646,220.67/2,455.47
6. Step 6: Final answer
   x = 2,299.45