Finding the Fourth Proportional to 115,704.72, 159,680.69 and 64,722.22

Step by Step Solution

1. Step 1: Write the proportion equation
   115,704.72 : 159,680.69 = 64,722.22 : x
2. Step 2: Convert to fraction form
   115,704.72/159,680.69 = 64,722.22/x
3. Step 3: Cross multiply
   115,704.72x = 159,680.69 × 64,722.22
4. Step 4: Simplify right side
   115,704.72x = 10,334,888,747.93
5. Step 5: Solve for x
   x = 10,334,888,747.93/115,704.72
6. Step 6: Final answer
   x = 89,321.24