Finding the Fourth Proportional to 21,776.28, 30,048.16 and 12,343

Step by Step Solution

1. Step 1: Write the proportion equation
   21,776.28 : 30,048.16 = 12,343 : x
2. Step 2: Convert to fraction form
   21,776.28/30,048.16 = 12,343/x
3. Step 3: Cross multiply
   21,776.28x = 30,048.16 × 12,343
4. Step 4: Simplify right side
   21,776.28x = 370,884,438.88
5. Step 5: Solve for x
   x = 370,884,438.88/21,776.28
6. Step 6: Final answer
   x = 17,031.58