Finding the Fourth Proportional to 2,830.56, 3,906.12 and 1,571.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.56 : 3,906.12 = 1,571.61 : x
2. Step 2: Convert to fraction form
   2,830.56/3,906.12 = 1,571.61/x
3. Step 3: Cross multiply
   2,830.56x = 3,906.12 × 1,571.61
4. Step 4: Simplify right side
   2,830.56x = 6,138,897.25
5. Step 5: Solve for x
   x = 6,138,897.25/2,830.56
6. Step 6: Final answer
   x = 2,168.79