Finding the Fourth Proportional to 172,164.35, 258,205.52 and 72,326.49

Step by Step Solution

1. Step 1: Write the proportion equation
   172,164.35 : 258,205.52 = 72,326.49 : x
2. Step 2: Convert to fraction form
   172,164.35/258,205.52 = 72,326.49/x
3. Step 3: Cross multiply
   172,164.35x = 258,205.52 × 72,326.49
4. Step 4: Simplify right side
   172,164.35x = 18,675,098,172.77
5. Step 5: Solve for x
   x = 18,675,098,172.77/172,164.35
6. Step 6: Final answer
   x = 108,472.50