Finding the Fourth Proportional to 118,908.21, 164,093.28 and 65,192.09

Step by Step Solution

1. Step 1: Write the proportion equation
   118,908.21 : 164,093.28 = 65,192.09 : x
2. Step 2: Convert to fraction form
   118,908.21/164,093.28 = 65,192.09/x
3. Step 3: Cross multiply
   118,908.21x = 164,093.28 × 65,192.09
4. Step 4: Simplify right side
   118,908.21x = 10,697,583,057.69
5. Step 5: Solve for x
   x = 10,697,583,057.69/118,908.21
6. Step 6: Final answer
   x = 89,965.05