Finding the Fourth Proportional to 3,169.83, 4,755.18 and 978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,169.83 : 4,755.18 = 978.72 : x
2. Step 2: Convert to fraction form
   3,169.83/4,755.18 = 978.72/x
3. Step 3: Cross multiply
   3,169.83x = 4,755.18 × 978.72
4. Step 4: Simplify right side
   3,169.83x = 4,653,989.77
5. Step 5: Solve for x
   x = 4,653,989.77/3,169.83
6. Step 6: Final answer
   x = 1,468.21