Finding the Fourth Proportional to 2,663.39, 3,995.25 and 814.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.39 : 3,995.25 = 814.63 : x
2. Step 2: Convert to fraction form
   2,663.39/3,995.25 = 814.63/x
3. Step 3: Cross multiply
   2,663.39x = 3,995.25 × 814.63
4. Step 4: Simplify right side
   2,663.39x = 3,254,650.51
5. Step 5: Solve for x
   x = 3,254,650.51/2,663.39
6. Step 6: Final answer
   x = 1,222.00