Finding the Fourth Proportional to 20,208.84, 27,892.50 and 13,581

Step by Step Solution

1. Step 1: Write the proportion equation
   20,208.84 : 27,892.50 = 13,581 : x
2. Step 2: Convert to fraction form
   20,208.84/27,892.50 = 13,581/x
3. Step 3: Cross multiply
   20,208.84x = 27,892.50 × 13,581
4. Step 4: Simplify right side
   20,208.84x = 378,808,042.50
5. Step 5: Solve for x
   x = 378,808,042.50/20,208.84
6. Step 6: Final answer
   x = 18,744.67