Finding the Fourth Proportional to 172,910.83, 259,303.86 and 73,078.75

Step by Step Solution

1. Step 1: Write the proportion equation
   172,910.83 : 259,303.86 = 73,078.75 : x
2. Step 2: Convert to fraction form
   172,910.83/259,303.86 = 73,078.75/x
3. Step 3: Cross multiply
   172,910.83x = 259,303.86 × 73,078.75
4. Step 4: Simplify right side
   172,910.83x = 18,949,601,958.98
5. Step 5: Solve for x
   x = 18,949,601,958.98/172,910.83
6. Step 6: Final answer
   x = 109,591.76