Finding the Fourth Proportional to 115,131.42, 172,647.72 and 40,229.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,131.42 : 172,647.72 = 40,229.10 : x
2. Step 2: Convert to fraction form
   115,131.42/172,647.72 = 40,229.10/x
3. Step 3: Cross multiply
   115,131.42x = 172,647.72 × 40,229.10
4. Step 4: Simplify right side
   115,131.42x = 6,945,462,392.65
5. Step 5: Solve for x
   x = 6,945,462,392.65/115,131.42
6. Step 6: Final answer
   x = 60,326.39