Finding the Fourth Proportional to 172,575.30, 258,757.25 and 67,271.25

Step by Step Solution

1. Step 1: Write the proportion equation
   172,575.30 : 258,757.25 = 67,271.25 : x
2. Step 2: Convert to fraction form
   172,575.30/258,757.25 = 67,271.25/x
3. Step 3: Cross multiply
   172,575.30x = 258,757.25 × 67,271.25
4. Step 4: Simplify right side
   172,575.30x = 17,406,923,317.71
5. Step 5: Solve for x
   x = 17,406,923,317.71/172,575.30
6. Step 6: Final answer
   x = 100,865.67