Finding the Fourth Proportional to 1,819.89, 2,730.29 and 779.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.89 : 2,730.29 = 779.94 : x
2. Step 2: Convert to fraction form
   1,819.89/2,730.29 = 779.94/x
3. Step 3: Cross multiply
   1,819.89x = 2,730.29 × 779.94
4. Step 4: Simplify right side
   1,819.89x = 2,129,458.48
5. Step 5: Solve for x
   x = 2,129,458.48/1,819.89
6. Step 6: Final answer
   x = 1,170.10