Finding the Fourth Proportional to 128,460.72, 192,761.59 and 65,286.29

Step by Step Solution

1. Step 1: Write the proportion equation
   128,460.72 : 192,761.59 = 65,286.29 : x
2. Step 2: Convert to fraction form
   128,460.72/192,761.59 = 65,286.29/x
3. Step 3: Cross multiply
   128,460.72x = 192,761.59 × 65,286.29
4. Step 4: Simplify right side
   128,460.72x = 12,584,689,065.60
5. Step 5: Solve for x
   x = 12,584,689,065.60/128,460.72
6. Step 6: Final answer
   x = 97,965.27