Finding the Fourth Proportional to 22,019.63, 30,387.11 and 12,588.39

Step by Step Solution

1. Step 1: Write the proportion equation
   22,019.63 : 30,387.11 = 12,588.39 : x
2. Step 2: Convert to fraction form
   22,019.63/30,387.11 = 12,588.39/x
3. Step 3: Cross multiply
   22,019.63x = 30,387.11 × 12,588.39
4. Step 4: Simplify right side
   22,019.63x = 382,524,728.71
5. Step 5: Solve for x
   x = 382,524,728.71/22,019.63
6. Step 6: Final answer
   x = 17,371.99