Finding the Fourth Proportional to 3,752.24, 5,628.72 and 978.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,752.24 : 5,628.72 = 978.90 : x
2. Step 2: Convert to fraction form
   3,752.24/5,628.72 = 978.90/x
3. Step 3: Cross multiply
   3,752.24x = 5,628.72 × 978.90
4. Step 4: Simplify right side
   3,752.24x = 5,509,954.01
5. Step 5: Solve for x
   x = 5,509,954.01/3,752.24
6. Step 6: Final answer
   x = 1,468.44