Finding the Fourth Proportional to 16,287.59, 22,457.18 and 13,765.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,287.59 : 22,457.18 = 13,765.25 : x
2. Step 2: Convert to fraction form
   16,287.59/22,457.18 = 13,765.25/x
3. Step 3: Cross multiply
   16,287.59x = 22,457.18 × 13,765.25
4. Step 4: Simplify right side
   16,287.59x = 309,128,628.17
5. Step 5: Solve for x
   x = 309,128,628.17/16,287.59
6. Step 6: Final answer
   x = 18,979.40