Finding the Fourth Proportional to 72,910.89, 109,760.23 and 65,578.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,910.89 : 109,760.23 = 65,578.79 : x
2. Step 2: Convert to fraction form
   72,910.89/109,760.23 = 65,578.79/x
3. Step 3: Cross multiply
   72,910.89x = 109,760.23 × 65,578.79
4. Step 4: Simplify right side
   72,910.89x = 7,197,942,196.83
5. Step 5: Solve for x
   x = 7,197,942,196.83/72,910.89
6. Step 6: Final answer
   x = 98,722.46