Finding the Fourth Proportional to 118,638.58, 163,650.09 and 78,352.42

Step by Step Solution

1. Step 1: Write the proportion equation
   118,638.58 : 163,650.09 = 78,352.42 : x
2. Step 2: Convert to fraction form
   118,638.58/163,650.09 = 78,352.42/x
3. Step 3: Cross multiply
   118,638.58x = 163,650.09 × 78,352.42
4. Step 4: Simplify right side
   118,638.58x = 12,822,380,584.72
5. Step 5: Solve for x
   x = 12,822,380,584.72/118,638.58
6. Step 6: Final answer
   x = 108,079.35