Finding the Fourth Proportional to 300,114.72, 414,144.90 and 172,763.28

Step by Step Solution

1. Step 1: Write the proportion equation
   300,114.72 : 414,144.90 = 172,763.28 : x
2. Step 2: Convert to fraction form
   300,114.72/414,144.90 = 172,763.28/x
3. Step 3: Cross multiply
   300,114.72x = 414,144.90 × 172,763.28
4. Step 4: Simplify right side
   300,114.72x = 71,549,031,319.27
5. Step 5: Solve for x
   x = 71,549,031,319.27/300,114.72
6. Step 6: Final answer
   x = 238,405.60