Finding the Fourth Proportional to 2,150.16, 3,223.86 and 978.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.16 : 3,223.86 = 978.96 : x
2. Step 2: Convert to fraction form
   2,150.16/3,223.86 = 978.96/x
3. Step 3: Cross multiply
   2,150.16x = 3,223.86 × 978.96
4. Step 4: Simplify right side
   2,150.16x = 3,156,029.99
5. Step 5: Solve for x
   x = 3,156,029.99/2,150.16
6. Step 6: Final answer
   x = 1,467.81