Finding the Fourth Proportional to 2,417.51, 3,625.59 and 857.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.51 : 3,625.59 = 857.30 : x
2. Step 2: Convert to fraction form
   2,417.51/3,625.59 = 857.30/x
3. Step 3: Cross multiply
   2,417.51x = 3,625.59 × 857.30
4. Step 4: Simplify right side
   2,417.51x = 3,108,200.18
5. Step 5: Solve for x
   x = 3,108,200.18/2,417.51
6. Step 6: Final answer
   x = 1,285.71