Finding the Fourth Proportional to 39,401.72, 54,394.44 and 30,429.08

Step by Step Solution

1. Step 1: Write the proportion equation
   39,401.72 : 54,394.44 = 30,429.08 : x
2. Step 2: Convert to fraction form
   39,401.72/54,394.44 = 30,429.08/x
3. Step 3: Cross multiply
   39,401.72x = 54,394.44 × 30,429.08
4. Step 4: Simplify right side
   39,401.72x = 1,655,172,766.32
5. Step 5: Solve for x
   x = 1,655,172,766.32/39,401.72
6. Step 6: Final answer
   x = 42,007.63