Finding the Fourth Proportional to 14,501.02, 20,012.81 and 8,128.69

Step by Step Solution

1. Step 1: Write the proportion equation
   14,501.02 : 20,012.81 = 8,128.69 : x
2. Step 2: Convert to fraction form
   14,501.02/20,012.81 = 8,128.69/x
3. Step 3: Cross multiply
   14,501.02x = 20,012.81 × 8,128.69
4. Step 4: Simplify right side
   14,501.02x = 162,677,928.52
5. Step 5: Solve for x
   x = 162,677,928.52/14,501.02
6. Step 6: Final answer
   x = 11,218.38