Finding the Fourth Proportional to 2,690.47, 3,712.59 and 1,571.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,690.47 : 3,712.59 = 1,571.35 : x
2. Step 2: Convert to fraction form
   2,690.47/3,712.59 = 1,571.35/x
3. Step 3: Cross multiply
   2,690.47x = 3,712.59 × 1,571.35
4. Step 4: Simplify right side
   2,690.47x = 5,833,778.30
5. Step 5: Solve for x
   x = 5,833,778.30/2,690.47
6. Step 6: Final answer
   x = 2,168.31