Finding the Fourth Proportional to 172,150.78, 258,241.06 and 47,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   172,150.78 : 258,241.06 = 47,491.78 : x
2. Step 2: Convert to fraction form
   172,150.78/258,241.06 = 47,491.78/x
3. Step 3: Cross multiply
   172,150.78x = 258,241.06 × 47,491.78
4. Step 4: Simplify right side
   172,150.78x = 12,264,327,723.51
5. Step 5: Solve for x
   x = 12,264,327,723.51/172,150.78
6. Step 6: Final answer
   x = 71,241.78