Finding the Fourth Proportional to 2,710.48, 4,064.28 and 978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,710.48 : 4,064.28 = 978.16 : x
2. Step 2: Convert to fraction form
   2,710.48/4,064.28 = 978.16/x
3. Step 3: Cross multiply
   2,710.48x = 4,064.28 × 978.16
4. Step 4: Simplify right side
   2,710.48x = 3,975,516.12
5. Step 5: Solve for x
   x = 3,975,516.12/2,710.48
6. Step 6: Final answer
   x = 1,466.72