Finding the Fourth Proportional to 2,892.73, 4,339.83 and 812.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,892.73 : 4,339.83 = 812.76 : x
2. Step 2: Convert to fraction form
   2,892.73/4,339.83 = 812.76/x
3. Step 3: Cross multiply
   2,892.73x = 4,339.83 × 812.76
4. Step 4: Simplify right side
   2,892.73x = 3,527,240.23
5. Step 5: Solve for x
   x = 3,527,240.23/2,892.73
6. Step 6: Final answer
   x = 1,219.35