Finding the Fourth Proportional to 1,571.45, 2,168.58 and 872.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.45 : 2,168.58 = 872.82 : x
2. Step 2: Convert to fraction form
   1,571.45/2,168.58 = 872.82/x
3. Step 3: Cross multiply
   1,571.45x = 2,168.58 × 872.82
4. Step 4: Simplify right side
   1,571.45x = 1,892,780.00
5. Step 5: Solve for x
   x = 1,892,780.00/1,571.45
6. Step 6: Final answer
   x = 1,204.48