Finding the Fourth Proportional to 118,879.30, 164,052.39 and 65,164.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,879.30 : 164,052.39 = 65,164.15 : x
2. Step 2: Convert to fraction form
   118,879.30/164,052.39 = 65,164.15/x
3. Step 3: Cross multiply
   118,879.30x = 164,052.39 × 65,164.15
4. Step 4: Simplify right side
   118,879.30x = 10,690,334,549.82
5. Step 5: Solve for x
   x = 10,690,334,549.82/118,879.30
6. Step 6: Final answer
   x = 89,925.95