Finding the Fourth Proportional to 21,809.04, 30,088.74 and 14,259.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,809.04 : 30,088.74 = 14,259.72 : x
2. Step 2: Convert to fraction form
   21,809.04/30,088.74 = 14,259.72/x
3. Step 3: Cross multiply
   21,809.04x = 30,088.74 × 14,259.72
4. Step 4: Simplify right side
   21,809.04x = 429,057,007.55
5. Step 5: Solve for x
   x = 429,057,007.55/21,809.04
6. Step 6: Final answer
   x = 19,673.36