Finding the Fourth Proportional to 1,667.72, 2,501.52 and 572.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.72 : 2,501.52 = 572.10 : x
2. Step 2: Convert to fraction form
   1,667.72/2,501.52 = 572.10/x
3. Step 3: Cross multiply
   1,667.72x = 2,501.52 × 572.10
4. Step 4: Simplify right side
   1,667.72x = 1,431,108.07
5. Step 5: Solve for x
   x = 1,431,108.07/1,667.72
6. Step 6: Final answer
   x = 858.12