Finding the Fourth Proportional to 2,124.64, 3,185.69 and 808.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.64 : 3,185.69 = 808.48 : x
2. Step 2: Convert to fraction form
   2,124.64/3,185.69 = 808.48/x
3. Step 3: Cross multiply
   2,124.64x = 3,185.69 × 808.48
4. Step 4: Simplify right side
   2,124.64x = 2,575,562.61
5. Step 5: Solve for x
   x = 2,575,562.61/2,124.64
6. Step 6: Final answer
   x = 1,212.24