Finding the Fourth Proportional to 16,387.61, 24,581.43 and 7,021.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,387.61 : 24,581.43 = 7,021.55 : x
2. Step 2: Convert to fraction form
   16,387.61/24,581.43 = 7,021.55/x
3. Step 3: Cross multiply
   16,387.61x = 24,581.43 × 7,021.55
4. Step 4: Simplify right side
   16,387.61x = 172,599,757.37
5. Step 5: Solve for x
   x = 172,599,757.37/16,387.61
6. Step 6: Final answer
   x = 10,532.34