Finding the Fourth Proportional to 172,241.76, 258,480.72 and 67,061.28

Step by Step Solution

1. Step 1: Write the proportion equation
   172,241.76 : 258,480.72 = 67,061.28 : x
2. Step 2: Convert to fraction form
   172,241.76/258,480.72 = 67,061.28/x
3. Step 3: Cross multiply
   172,241.76x = 258,480.72 × 67,061.28
4. Step 4: Simplify right side
   172,241.76x = 17,334,047,938.52
5. Step 5: Solve for x
   x = 17,334,047,938.52/172,241.76
6. Step 6: Final answer
   x = 100,637.89