Finding the Fourth Proportional to 16,408.31, 22,642.11 and 9,238.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,408.31 : 22,642.11 = 9,238.88 : x
2. Step 2: Convert to fraction form
   16,408.31/22,642.11 = 9,238.88/x
3. Step 3: Cross multiply
   16,408.31x = 22,642.11 × 9,238.88
4. Step 4: Simplify right side
   16,408.31x = 209,187,746.72
5. Step 5: Solve for x
   x = 209,187,746.72/16,408.31
6. Step 6: Final answer
   x = 12,748.89