Finding the Fourth Proportional to 30,849.71, 42,572.72 and 17,421.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,849.71 : 42,572.72 = 17,421.12 : x
2. Step 2: Convert to fraction form
   30,849.71/42,572.72 = 17,421.12/x
3. Step 3: Cross multiply
   30,849.71x = 42,572.72 × 17,421.12
4. Step 4: Simplify right side
   30,849.71x = 741,664,507.40
5. Step 5: Solve for x
   x = 741,664,507.40/30,849.71
6. Step 6: Final answer
   x = 24,041.22