Finding the Fourth Proportional to 259,797.38, 389,697.89 and 72,808.88

Step by Step Solution

1. Step 1: Write the proportion equation
   259,797.38 : 389,697.89 = 72,808.88 : x
2. Step 2: Convert to fraction form
   259,797.38/389,697.89 = 72,808.88/x
3. Step 3: Cross multiply
   259,797.38x = 389,697.89 × 72,808.88
4. Step 4: Simplify right side
   259,797.38x = 28,373,464,596.73
5. Step 5: Solve for x
   x = 28,373,464,596.73/259,797.38
6. Step 6: Final answer
   x = 109,213.82