Finding the Fourth Proportional to 2,111.75, 3,167.38 and 572.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.75 : 3,167.38 = 572.63 : x
2. Step 2: Convert to fraction form
   2,111.75/3,167.38 = 572.63/x
3. Step 3: Cross multiply
   2,111.75x = 3,167.38 × 572.63
4. Step 4: Simplify right side
   2,111.75x = 1,813,736.81
5. Step 5: Solve for x
   x = 1,813,736.81/2,111.75
6. Step 6: Final answer
   x = 858.88