Finding the Fourth Proportional to 300,819.78, 415,142.73 and 171,779.28

Step by Step Solution

1. Step 1: Write the proportion equation
   300,819.78 : 415,142.73 = 171,779.28 : x
2. Step 2: Convert to fraction form
   300,819.78/415,142.73 = 171,779.28/x
3. Step 3: Cross multiply
   300,819.78x = 415,142.73 × 171,779.28
4. Step 4: Simplify right side
   300,819.78x = 71,312,919,256.63
5. Step 5: Solve for x
   x = 71,312,919,256.63/300,819.78
6. Step 6: Final answer
   x = 237,061.94