Finding the Fourth Proportional to 2,623.26, 3,931.38 and 978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.26 : 3,931.38 = 978.24 : x
2. Step 2: Convert to fraction form
   2,623.26/3,931.38 = 978.24/x
3. Step 3: Cross multiply
   2,623.26x = 3,931.38 × 978.24
4. Step 4: Simplify right side
   2,623.26x = 3,845,833.17
5. Step 5: Solve for x
   x = 3,845,833.17/2,623.26
6. Step 6: Final answer
   x = 1,466.05