Finding the Fourth Proportional to 1,686.42, 2,498.04 and 1,666.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.42 : 2,498.04 = 1,666.98 : x
2. Step 2: Convert to fraction form
   1,686.42/2,498.04 = 1,666.98/x
3. Step 3: Cross multiply
   1,686.42x = 2,498.04 × 1,666.98
4. Step 4: Simplify right side
   1,686.42x = 4,164,182.72
5. Step 5: Solve for x
   x = 4,164,182.72/1,686.42
6. Step 6: Final answer
   x = 2,469.24