Finding the Fourth Proportional to 118,326.72, 163,291.16 and 64,612.16

Step by Step Solution

1. Step 1: Write the proportion equation
   118,326.72 : 163,291.16 = 64,612.16 : x
2. Step 2: Convert to fraction form
   118,326.72/163,291.16 = 64,612.16/x
3. Step 3: Cross multiply
   118,326.72x = 163,291.16 × 64,612.16
4. Step 4: Simplify right side
   118,326.72x = 10,550,594,556.51
5. Step 5: Solve for x
   x = 10,550,594,556.51/118,326.72
6. Step 6: Final answer
   x = 89,164.94