Finding the Fourth Proportional to 21,980.33, 32,956.61 and 12,126.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,980.33 : 32,956.61 = 12,126.47 : x
2. Step 2: Convert to fraction form
   21,980.33/32,956.61 = 12,126.47/x
3. Step 3: Cross multiply
   21,980.33x = 32,956.61 × 12,126.47
4. Step 4: Simplify right side
   21,980.33x = 399,647,342.47
5. Step 5: Solve for x
   x = 399,647,342.47/21,980.33
6. Step 6: Final answer
   x = 18,182.05