Finding the Fourth Proportional to 21,966.72, 30,316.25 and 12,536.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,966.72 : 30,316.25 = 12,536.70 : x
2. Step 2: Convert to fraction form
   21,966.72/30,316.25 = 12,536.70/x
3. Step 3: Cross multiply
   21,966.72x = 30,316.25 × 12,536.70
4. Step 4: Simplify right side
   21,966.72x = 380,065,731.38
5. Step 5: Solve for x
   x = 380,065,731.38/21,966.72
6. Step 6: Final answer
   x = 17,301.89