Finding the Fourth Proportional to 2,999.89, 4,499.42 and 808.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,999.89 : 4,499.42 = 808.79 : x
2. Step 2: Convert to fraction form
   2,999.89/4,499.42 = 808.79/x
3. Step 3: Cross multiply
   2,999.89x = 4,499.42 × 808.79
4. Step 4: Simplify right side
   2,999.89x = 3,639,066.18
5. Step 5: Solve for x
   x = 3,639,066.18/2,999.89
6. Step 6: Final answer
   x = 1,213.07