Finding the Fourth Proportional to 107,872.60, 162,003.30 and 78,323.80

Step by Step Solution

1. Step 1: Write the proportion equation
   107,872.60 : 162,003.30 = 78,323.80 : x
2. Step 2: Convert to fraction form
   107,872.60/162,003.30 = 78,323.80/x
3. Step 3: Cross multiply
   107,872.60x = 162,003.30 × 78,323.80
4. Step 4: Simplify right side
   107,872.60x = 12,688,714,068.54
5. Step 5: Solve for x
   x = 12,688,714,068.54/107,872.60
6. Step 6: Final answer
   x = 117,626.85