Finding the Fourth Proportional to 2,459.55, 3,689.27 and 816.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.55 : 3,689.27 = 816.11 : x
2. Step 2: Convert to fraction form
   2,459.55/3,689.27 = 816.11/x
3. Step 3: Cross multiply
   2,459.55x = 3,689.27 × 816.11
4. Step 4: Simplify right side
   2,459.55x = 3,010,827.61
5. Step 5: Solve for x
   x = 3,010,827.61/2,459.55
6. Step 6: Final answer
   x = 1,224.14