Finding the Fourth Proportional to 118,480.50, 163,498.50 and 64,767.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,480.50 : 163,498.50 = 64,767.60 : x
2. Step 2: Convert to fraction form
   118,480.50/163,498.50 = 64,767.60/x
3. Step 3: Cross multiply
   118,480.50x = 163,498.50 × 64,767.60
4. Step 4: Simplify right side
   118,480.50x = 10,589,405,448.60
5. Step 5: Solve for x
   x = 10,589,405,448.60/118,480.50
6. Step 6: Final answer
   x = 89,376.78