Finding the Fourth Proportional to 78,989.55, 109,007.67 and 47,176.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,989.55 : 109,007.67 = 47,176.80 : x
2. Step 2: Convert to fraction form
   78,989.55/109,007.67 = 47,176.80/x
3. Step 3: Cross multiply
   78,989.55x = 109,007.67 × 47,176.80
4. Step 4: Simplify right side
   78,989.55x = 5,142,633,046.06
5. Step 5: Solve for x
   x = 5,142,633,046.06/78,989.55
6. Step 6: Final answer
   x = 65,105.23