Finding the Fourth Proportional to 2,313.72, 3,467.34 and 1,078.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,313.72 : 3,467.34 = 1,078.20 : x
2. Step 2: Convert to fraction form
   2,313.72/3,467.34 = 1,078.20/x
3. Step 3: Cross multiply
   2,313.72x = 3,467.34 × 1,078.20
4. Step 4: Simplify right side
   2,313.72x = 3,738,485.99
5. Step 5: Solve for x
   x = 3,738,485.99/2,313.72
6. Step 6: Final answer
   x = 1,615.79