Finding the Fourth Proportional to 118,650.90, 163,738.32 and 64,935.90

Step by Step Solution

1. Step 1: Write the proportion equation
   118,650.90 : 163,738.32 = 64,935.90 : x
2. Step 2: Convert to fraction form
   118,650.90/163,738.32 = 64,935.90/x
3. Step 3: Cross multiply
   118,650.90x = 163,738.32 × 64,935.90
4. Step 4: Simplify right side
   118,650.90x = 10,632,495,173.69
5. Step 5: Solve for x
   x = 10,632,495,173.69/118,650.90
6. Step 6: Final answer
   x = 89,611.58