Finding the Fourth Proportional to 47,978.16, 71,965.16 and 16,391.04

Step by Step Solution

1. Step 1: Write the proportion equation
   47,978.16 : 71,965.16 = 16,391.04 : x
2. Step 2: Convert to fraction form
   47,978.16/71,965.16 = 16,391.04/x
3. Step 3: Cross multiply
   47,978.16x = 71,965.16 × 16,391.04
4. Step 4: Simplify right side
   47,978.16x = 1,179,583,456.34
5. Step 5: Solve for x
   x = 1,179,583,456.34/47,978.16
6. Step 6: Final answer
   x = 24,585.84