Finding the Fourth Proportional to 14,419.21, 19,898.51 and 8,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,419.21 : 19,898.51 = 8,131.59 : x
2. Step 2: Convert to fraction form
   14,419.21/19,898.51 = 8,131.59/x
3. Step 3: Cross multiply
   14,419.21x = 19,898.51 × 8,131.59
4. Step 4: Simplify right side
   14,419.21x = 161,806,524.93
5. Step 5: Solve for x
   x = 161,806,524.93/14,419.21
6. Step 6: Final answer
   x = 11,221.59