Finding the Fourth Proportional to 1,686.71, 2,517.29 and 1,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.71 : 2,517.29 = 1,590.72 : x
2. Step 2: Convert to fraction form
   1,686.71/2,517.29 = 1,590.72/x
3. Step 3: Cross multiply
   1,686.71x = 2,517.29 × 1,590.72
4. Step 4: Simplify right side
   1,686.71x = 4,004,295.60
5. Step 5: Solve for x
   x = 4,004,295.60/1,686.71
6. Step 6: Final answer
   x = 2,374.03