Finding the Fourth Proportional to 30,724.31, 42,404.96 and 29,321.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,724.31 : 42,404.96 = 29,321.91 : x
2. Step 2: Convert to fraction form
   30,724.31/42,404.96 = 29,321.91/x
3. Step 3: Cross multiply
   30,724.31x = 42,404.96 × 29,321.91
4. Step 4: Simplify right side
   30,724.31x = 1,243,394,420.67
5. Step 5: Solve for x
   x = 1,243,394,420.67/30,724.31
6. Step 6: Final answer
   x = 40,469.40