Finding the Fourth Proportional to 2,111.61, 3,167.05 and 572.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.61 : 3,167.05 = 572.25 : x
2. Step 2: Convert to fraction form
   2,111.61/3,167.05 = 572.25/x
3. Step 3: Cross multiply
   2,111.61x = 3,167.05 × 572.25
4. Step 4: Simplify right side
   2,111.61x = 1,812,344.36
5. Step 5: Solve for x
   x = 1,812,344.36/2,111.61
6. Step 6: Final answer
   x = 858.28