Finding the Fourth Proportional to 2,899.76, 4,348.98 and 819.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,899.76 : 4,348.98 = 819.98 : x
2. Step 2: Convert to fraction form
   2,899.76/4,348.98 = 819.98/x
3. Step 3: Cross multiply
   2,899.76x = 4,348.98 × 819.98
4. Step 4: Simplify right side
   2,899.76x = 3,566,076.62
5. Step 5: Solve for x
   x = 3,566,076.62/2,899.76
6. Step 6: Final answer
   x = 1,229.78