Finding the Fourth Proportional to 128,697.07, 192,930.78 and 65,481.83

Step by Step Solution

1. Step 1: Write the proportion equation
   128,697.07 : 192,930.78 = 65,481.83 : x
2. Step 2: Convert to fraction form
   128,697.07/192,930.78 = 65,481.83/x
3. Step 3: Cross multiply
   128,697.07x = 192,930.78 × 65,481.83
4. Step 4: Simplify right side
   128,697.07x = 12,633,461,506.77
5. Step 5: Solve for x
   x = 12,633,461,506.77/128,697.07
6. Step 6: Final answer
   x = 98,164.33