Finding the Fourth Proportional to 118,921.61, 164,110.55 and 65,206.46

Step by Step Solution

1. Step 1: Write the proportion equation
   118,921.61 : 164,110.55 = 65,206.46 : x
2. Step 2: Convert to fraction form
   118,921.61/164,110.55 = 65,206.46/x
3. Step 3: Cross multiply
   118,921.61x = 164,110.55 × 65,206.46
4. Step 4: Simplify right side
   118,921.61x = 10,701,066,867.57
5. Step 5: Solve for x
   x = 10,701,066,867.57/118,921.61
6. Step 6: Final answer
   x = 89,984.21