Finding the Fourth Proportional to 118,821.35, 163,973.36 and 65,109.71

Step by Step Solution

1. Step 1: Write the proportion equation
   118,821.35 : 163,973.36 = 65,109.71 : x
2. Step 2: Convert to fraction form
   118,821.35/163,973.36 = 65,109.71/x
3. Step 3: Cross multiply
   118,821.35x = 163,973.36 × 65,109.71
4. Step 4: Simplify right side
   118,821.35x = 10,676,256,771.91
5. Step 5: Solve for x
   x = 10,676,256,771.91/118,821.35
6. Step 6: Final answer
   x = 89,851.34