Finding the Fourth Proportional to 2,999.76, 4,499.63 and 808.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,999.76 : 4,499.63 = 808.71 : x
2. Step 2: Convert to fraction form
   2,999.76/4,499.63 = 808.71/x
3. Step 3: Cross multiply
   2,999.76x = 4,499.63 × 808.71
4. Step 4: Simplify right side
   2,999.76x = 3,638,895.78
5. Step 5: Solve for x
   x = 3,638,895.78/2,999.76
6. Step 6: Final answer
   x = 1,213.06