Finding the Fourth Proportional to 1,645.00, 2,462.18 and 863.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.00 : 2,462.18 = 863.89 : x
2. Step 2: Convert to fraction form
   1,645.00/2,462.18 = 863.89/x
3. Step 3: Cross multiply
   1,645.00x = 2,462.18 × 863.89
4. Step 4: Simplify right side
   1,645.00x = 2,127,042.21
5. Step 5: Solve for x
   x = 2,127,042.21/1,645.00
6. Step 6: Final answer
   x = 1,293.04