Finding the Fourth Proportional to 98,665.73, 136,067.85 and 64,661.83

Step by Step Solution

1. Step 1: Write the proportion equation
   98,665.73 : 136,067.85 = 64,661.83 : x
2. Step 2: Convert to fraction form
   98,665.73/136,067.85 = 64,661.83/x
3. Step 3: Cross multiply
   98,665.73x = 136,067.85 × 64,661.83
4. Step 4: Simplify right side
   98,665.73x = 8,798,395,845.00
5. Step 5: Solve for x
   x = 8,798,395,845.00/98,665.73
6. Step 6: Final answer
   x = 89,173.78