Finding the Fourth Proportional to 118,672.38, 163,768.06 and 64,960.80

Step by Step Solution

1. Step 1: Write the proportion equation
   118,672.38 : 163,768.06 = 64,960.80 : x
2. Step 2: Convert to fraction form
   118,672.38/163,768.06 = 64,960.80/x
3. Step 3: Cross multiply
   118,672.38x = 163,768.06 × 64,960.80
4. Step 4: Simplify right side
   118,672.38x = 10,638,503,659.12
5. Step 5: Solve for x
   x = 10,638,503,659.12/118,672.38
6. Step 6: Final answer
   x = 89,646.00