Finding the Fourth Proportional to 21,966.47, 30,315.89 and 12,536.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,966.47 : 30,315.89 = 12,536.45 : x
2. Step 2: Convert to fraction form
   21,966.47/30,315.89 = 12,536.45/x
3. Step 3: Cross multiply
   21,966.47x = 30,315.89 × 12,536.45
4. Step 4: Simplify right side
   21,966.47x = 380,053,639.19
5. Step 5: Solve for x
   x = 380,053,639.19/21,966.47
6. Step 6: Final answer
   x = 17,301.53