Finding the Fourth Proportional to 14,421.72, 19,902.33 and 8,134.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,421.72 : 19,902.33 = 8,134.50 : x
2. Step 2: Convert to fraction form
   14,421.72/19,902.33 = 8,134.50/x
3. Step 3: Cross multiply
   14,421.72x = 19,902.33 × 8,134.50
4. Step 4: Simplify right side
   14,421.72x = 161,895,503.39
5. Step 5: Solve for x
   x = 161,895,503.39/14,421.72
6. Step 6: Final answer
   x = 11,225.81