Finding the Fourth Proportional to 107,308.56, 160,839 and 78,805.20

Step by Step Solution

1. Step 1: Write the proportion equation
   107,308.56 : 160,839 = 78,805.20 : x
2. Step 2: Convert to fraction form
   107,308.56/160,839 = 78,805.20/x
3. Step 3: Cross multiply
   107,308.56x = 160,839 × 78,805.20
4. Step 4: Simplify right side
   107,308.56x = 12,674,949,562.80
5. Step 5: Solve for x
   x = 12,674,949,562.80/107,308.56
6. Step 6: Final answer
   x = 118,116.85