Finding the Fourth Proportional to 107,101.20, 160,498.20 and 78,800.40

Step by Step Solution

1. Step 1: Write the proportion equation
   107,101.20 : 160,498.20 = 78,800.40 : x
2. Step 2: Convert to fraction form
   107,101.20/160,498.20 = 78,800.40/x
3. Step 3: Cross multiply
   107,101.20x = 160,498.20 × 78,800.40
4. Step 4: Simplify right side
   107,101.20x = 12,647,322,359.28
5. Step 5: Solve for x
   x = 12,647,322,359.28/107,101.20
6. Step 6: Final answer
   x = 118,087.59