Finding the Fourth Proportional to 1,570.95, 2,167.88 and 872.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.95 : 2,167.88 = 872.33 : x
2. Step 2: Convert to fraction form
   1,570.95/2,167.88 = 872.33/x
3. Step 3: Cross multiply
   1,570.95x = 2,167.88 × 872.33
4. Step 4: Simplify right side
   1,570.95x = 1,891,091.56
5. Step 5: Solve for x
   x = 1,891,091.56/1,570.95
6. Step 6: Final answer
   x = 1,203.79