Finding the Fourth Proportional to 21,182.43, 31,777.74 and 10,654.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,182.43 : 31,777.74 = 10,654.76 : x
2. Step 2: Convert to fraction form
   21,182.43/31,777.74 = 10,654.76/x
3. Step 3: Cross multiply
   21,182.43x = 31,777.74 × 10,654.76
4. Step 4: Simplify right side
   21,182.43x = 338,584,034.15
5. Step 5: Solve for x
   x = 338,584,034.15/21,182.43
6. Step 6: Final answer
   x = 15,984.19