Finding the Fourth Proportional to 118,481.50, 163,499.88 and 64,768.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,481.50 : 163,499.88 = 64,768.60 : x
2. Step 2: Convert to fraction form
   118,481.50/163,499.88 = 64,768.60/x
3. Step 3: Cross multiply
   118,481.50x = 163,499.88 × 64,768.60
4. Step 4: Simplify right side
   118,481.50x = 10,589,658,327.77
5. Step 5: Solve for x
   x = 10,589,658,327.77/118,481.50
6. Step 6: Final answer
   x = 89,378.16