Finding the Fourth Proportional to 1,570.91, 2,167.82 and 872.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.91 : 2,167.82 = 872.27 : x
2. Step 2: Convert to fraction form
   1,570.91/2,167.82 = 872.27/x
3. Step 3: Cross multiply
   1,570.91x = 2,167.82 × 872.27
4. Step 4: Simplify right side
   1,570.91x = 1,890,909.15
5. Step 5: Solve for x
   x = 1,890,909.15/1,570.91
6. Step 6: Final answer
   x = 1,203.71