Finding the Fourth Proportional to 128,978.73, 193,462.83 and 65,797.46

Step by Step Solution

1. Step 1: Write the proportion equation
   128,978.73 : 193,462.83 = 65,797.46 : x
2. Step 2: Convert to fraction form
   128,978.73/193,462.83 = 65,797.46/x
3. Step 3: Cross multiply
   128,978.73x = 193,462.83 × 65,797.46
4. Step 4: Simplify right side
   128,978.73x = 12,729,363,664.81
5. Step 5: Solve for x
   x = 12,729,363,664.81/128,978.73
6. Step 6: Final answer
   x = 98,693.51