Finding the Fourth Proportional to 21,808.63, 30,111.11 and 14,649.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,808.63 : 30,111.11 = 14,649.45 : x
2. Step 2: Convert to fraction form
   21,808.63/30,111.11 = 14,649.45/x
3. Step 3: Cross multiply
   21,808.63x = 30,111.11 × 14,649.45
4. Step 4: Simplify right side
   21,808.63x = 441,111,200.39
5. Step 5: Solve for x
   x = 441,111,200.39/21,808.63
6. Step 6: Final answer
   x = 20,226.45