Finding the Fourth Proportional to 300,775.30, 415,042.31 and 173,426.29

Step by Step Solution

1. Step 1: Write the proportion equation
   300,775.30 : 415,042.31 = 173,426.29 : x
2. Step 2: Convert to fraction form
   300,775.30/415,042.31 = 173,426.29/x
3. Step 3: Cross multiply
   300,775.30x = 415,042.31 × 173,426.29
4. Step 4: Simplify right side
   300,775.30x = 71,979,248,016.33
5. Step 5: Solve for x
   x = 71,979,248,016.33/300,775.30
6. Step 6: Final answer
   x = 239,312.36