Finding the Fourth Proportional to 2,459.25, 3,689.42 and 816.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.25 : 3,689.42 = 816.98 : x
2. Step 2: Convert to fraction form
   2,459.25/3,689.42 = 816.98/x
3. Step 3: Cross multiply
   2,459.25x = 3,689.42 × 816.98
4. Step 4: Simplify right side
   2,459.25x = 3,014,159.82
5. Step 5: Solve for x
   x = 3,014,159.82/2,459.25
6. Step 6: Final answer
   x = 1,225.64