Finding the Fourth Proportional to 2,709.42, 4,065.24 and 978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.42 : 4,065.24 = 978.18 : x
2. Step 2: Convert to fraction form
   2,709.42/4,065.24 = 978.18/x
3. Step 3: Cross multiply
   2,709.42x = 4,065.24 × 978.18
4. Step 4: Simplify right side
   2,709.42x = 3,976,536.46
5. Step 5: Solve for x
   x = 3,976,536.46/2,709.42
6. Step 6: Final answer
   x = 1,467.67