Finding the Fourth Proportional to 2,867.34, 4,300.92 and 815.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,867.34 : 4,300.92 = 815.34 : x
2. Step 2: Convert to fraction form
   2,867.34/4,300.92 = 815.34/x
3. Step 3: Cross multiply
   2,867.34x = 4,300.92 × 815.34
4. Step 4: Simplify right side
   2,867.34x = 3,506,712.11
5. Step 5: Solve for x
   x = 3,506,712.11/2,867.34
6. Step 6: Final answer
   x = 1,222.98