Finding the Fourth Proportional to 118,738.63, 163,857.32 and 64,290.35

Step by Step Solution

1. Step 1: Write the proportion equation
   118,738.63 : 163,857.32 = 64,290.35 : x
2. Step 2: Convert to fraction form
   118,738.63/163,857.32 = 64,290.35/x
3. Step 3: Cross multiply
   118,738.63x = 163,857.32 × 64,290.35
4. Step 4: Simplify right side
   118,738.63x = 10,534,444,452.86
5. Step 5: Solve for x
   x = 10,534,444,452.86/118,738.63
6. Step 6: Final answer
   x = 88,719.61