Finding the Fourth Proportional to 1,571.46, 2,168.73 and 872.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.46 : 2,168.73 = 872.79 : x
2. Step 2: Convert to fraction form
   1,571.46/2,168.73 = 872.79/x
3. Step 3: Cross multiply
   1,571.46x = 2,168.73 × 872.79
4. Step 4: Simplify right side
   1,571.46x = 1,892,845.86
5. Step 5: Solve for x
   x = 1,892,845.86/1,571.46
6. Step 6: Final answer
   x = 1,204.51