Finding the Fourth Proportional to 301,181.50, 415,623 and 172,111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   301,181.50 : 415,623 = 172,111.78 : x
2. Step 2: Convert to fraction form
   301,181.50/415,623 = 172,111.78/x
3. Step 3: Cross multiply
   301,181.50x = 415,623 × 172,111.78
4. Step 4: Simplify right side
   301,181.50x = 71,533,614,338.94
5. Step 5: Solve for x
   x = 71,533,614,338.94/301,181.50
6. Step 6: Final answer
   x = 237,509.99