Finding the Fourth Proportional to 2,952.27, 4,428.86 and 978.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,952.27 : 4,428.86 = 978.11 : x
2. Step 2: Convert to fraction form
   2,952.27/4,428.86 = 978.11/x
3. Step 3: Cross multiply
   2,952.27x = 4,428.86 × 978.11
4. Step 4: Simplify right side
   2,952.27x = 4,331,912.25
5. Step 5: Solve for x
   x = 4,331,912.25/2,952.27
6. Step 6: Final answer
   x = 1,467.32