Finding the Fourth Proportional to 172,213.86, 258,320.42 and 47,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,213.86 : 258,320.42 = 47,554.50 : x
2. Step 2: Convert to fraction form
   172,213.86/258,320.42 = 47,554.50/x
3. Step 3: Cross multiply
   172,213.86x = 258,320.42 × 47,554.50
4. Step 4: Simplify right side
   172,213.86x = 12,284,298,412.89
5. Step 5: Solve for x
   x = 12,284,298,412.89/172,213.86
6. Step 6: Final answer
   x = 71,331.65