Finding the Fourth Proportional to 1,570.59, 2,167.43 and 872.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.59 : 2,167.43 = 872.01 : x
2. Step 2: Convert to fraction form
   1,570.59/2,167.43 = 872.01/x
3. Step 3: Cross multiply
   1,570.59x = 2,167.43 × 872.01
4. Step 4: Simplify right side
   1,570.59x = 1,890,016.27
5. Step 5: Solve for x
   x = 1,890,016.27/1,570.59
6. Step 6: Final answer
   x = 1,203.38