Finding the Fourth Proportional to 1,571.52, 2,168.60 and 872.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.52 : 2,168.60 = 872.88 : x
2. Step 2: Convert to fraction form
   1,571.52/2,168.60 = 872.88/x
3. Step 3: Cross multiply
   1,571.52x = 2,168.60 × 872.88
4. Step 4: Simplify right side
   1,571.52x = 1,892,927.57
5. Step 5: Solve for x
   x = 1,892,927.57/1,571.52
6. Step 6: Final answer
   x = 1,204.52