Finding the Fourth Proportional to 2,459.51, 3,689.73 and 816.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.51 : 3,689.73 = 816.15 : x
2. Step 2: Convert to fraction form
   2,459.51/3,689.73 = 816.15/x
3. Step 3: Cross multiply
   2,459.51x = 3,689.73 × 816.15
4. Step 4: Simplify right side
   2,459.51x = 3,011,373.14
5. Step 5: Solve for x
   x = 3,011,373.14/2,459.51
6. Step 6: Final answer
   x = 1,224.38