Finding the Fourth Proportional to 172,626.18, 258,971.94 and 67,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,626.18 : 258,971.94 = 67,438.50 : x
2. Step 2: Convert to fraction form
   172,626.18/258,971.94 = 67,438.50/x
3. Step 3: Cross multiply
   172,626.18x = 258,971.94 × 67,438.50
4. Step 4: Simplify right side
   172,626.18x = 17,464,679,175.69
5. Step 5: Solve for x
   x = 17,464,679,175.69/172,626.18
6. Step 6: Final answer
   x = 101,170.51