Finding the Fourth Proportional to 118,920.86, 164,109.51 and 65,205.71

Step by Step Solution

1. Step 1: Write the proportion equation
   118,920.86 : 164,109.51 = 65,205.71 : x
2. Step 2: Convert to fraction form
   118,920.86/164,109.51 = 65,205.71/x
3. Step 3: Cross multiply
   118,920.86x = 164,109.51 × 65,205.71
4. Step 4: Simplify right side
   118,920.86x = 10,700,876,296.75
5. Step 5: Solve for x
   x = 10,700,876,296.75/118,920.86
6. Step 6: Final answer
   x = 89,983.18