Finding the Fourth Proportional to 2,459.84, 3,689.01 and 816.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.84 : 3,689.01 = 816.01 : x
2. Step 2: Convert to fraction form
   2,459.84/3,689.01 = 816.01/x
3. Step 3: Cross multiply
   2,459.84x = 3,689.01 × 816.01
4. Step 4: Simplify right side
   2,459.84x = 3,010,259.83
5. Step 5: Solve for x
   x = 3,010,259.83/2,459.84
6. Step 6: Final answer
   x = 1,223.76