Finding the Fourth Proportional to 3,900.44, 5,850.52 and 978.73

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.44 : 5,850.52 = 978.73 : x
2. Step 2: Convert to fraction form
   3,900.44/5,850.52 = 978.73/x
3. Step 3: Cross multiply
   3,900.44x = 5,850.52 × 978.73
4. Step 4: Simplify right side
   3,900.44x = 5,726,079.44
5. Step 5: Solve for x
   x = 5,726,079.44/3,900.44
6. Step 6: Final answer
   x = 1,468.06