Finding the Fourth Proportional to 39,404.47, 54,398.24 and 30,431.83

Step by Step Solution

1. Step 1: Write the proportion equation
   39,404.47 : 54,398.24 = 30,431.83 : x
2. Step 2: Convert to fraction form
   39,404.47/54,398.24 = 30,431.83/x
3. Step 3: Cross multiply
   39,404.47x = 54,398.24 × 30,431.83
4. Step 4: Simplify right side
   39,404.47x = 1,655,437,991.98
5. Step 5: Solve for x
   x = 1,655,437,991.98/39,404.47
6. Step 6: Final answer
   x = 42,011.43