Finding the Fourth Proportional to 1,570.82, 2,167.83 and 872.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.82 : 2,167.83 = 872.19 : x
2. Step 2: Convert to fraction form
   1,570.82/2,167.83 = 872.19/x
3. Step 3: Cross multiply
   1,570.82x = 2,167.83 × 872.19
4. Step 4: Simplify right side
   1,570.82x = 1,890,755.29
5. Step 5: Solve for x
   x = 1,890,755.29/1,570.82
6. Step 6: Final answer
   x = 1,203.68