Finding the Fourth Proportional to 124,786.72, 172,205.72 and 68,198.08

Step by Step Solution

1. Step 1: Write the proportion equation
   124,786.72 : 172,205.72 = 68,198.08 : x
2. Step 2: Convert to fraction form
   124,786.72/172,205.72 = 68,198.08/x
3. Step 3: Cross multiply
   124,786.72x = 172,205.72 × 68,198.08
4. Step 4: Simplify right side
   124,786.72x = 11,744,099,469.02
5. Step 5: Solve for x
   x = 11,744,099,469.02/124,786.72
6. Step 6: Final answer
   x = 94,113.38