Finding the Fourth Proportional to 1,570.83, 2,167.88 and 872.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.83 : 2,167.88 = 872.25 : x
2. Step 2: Convert to fraction form
   1,570.83/2,167.88 = 872.25/x
3. Step 3: Cross multiply
   1,570.83x = 2,167.88 × 872.25
4. Step 4: Simplify right side
   1,570.83x = 1,890,928.97
5. Step 5: Solve for x
   x = 1,890,928.97/1,570.83
6. Step 6: Final answer
   x = 1,203.78