Finding the Fourth Proportional to 1,630.89, 2,445.62 and 808.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.89 : 2,445.62 = 808.83 : x
2. Step 2: Convert to fraction form
   1,630.89/2,445.62 = 808.83/x
3. Step 3: Cross multiply
   1,630.89x = 2,445.62 × 808.83
4. Step 4: Simplify right side
   1,630.89x = 1,978,086.78
5. Step 5: Solve for x
   x = 1,978,086.78/1,630.89
6. Step 6: Final answer
   x = 1,212.89