Finding the Fourth Proportional to 118,920.84, 164,112.35 and 65,205.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,920.84 : 164,112.35 = 65,205.72 : x
2. Step 2: Convert to fraction form
   118,920.84/164,112.35 = 65,205.72/x
3. Step 3: Cross multiply
   118,920.84x = 164,112.35 × 65,205.72
4. Step 4: Simplify right side
   118,920.84x = 10,701,063,942.64
5. Step 5: Solve for x
   x = 10,701,063,942.64/118,920.84
6. Step 6: Final answer
   x = 89,984.77