Finding the Fourth Proportional to 1,570.71, 2,167.67 and 872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.71 : 2,167.67 = 872.10 : x
2. Step 2: Convert to fraction form
   1,570.71/2,167.67 = 872.10/x
3. Step 3: Cross multiply
   1,570.71x = 2,167.67 × 872.10
4. Step 4: Simplify right side
   1,570.71x = 1,890,420.65
5. Step 5: Solve for x
   x = 1,890,420.65/1,570.71
6. Step 6: Final answer
   x = 1,203.55