Finding the Fourth Proportional to 2,572.52, 3,858.73 and 817.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.52 : 3,858.73 = 817.63 : x
2. Step 2: Convert to fraction form
   2,572.52/3,858.73 = 817.63/x
3. Step 3: Cross multiply
   2,572.52x = 3,858.73 × 817.63
4. Step 4: Simplify right side
   2,572.52x = 3,155,004.02
5. Step 5: Solve for x
   x = 3,155,004.02/2,572.52
6. Step 6: Final answer
   x = 1,226.43