Finding the Fourth Proportional to 21,275.84, 31,866.24 and 15,419

Step by Step Solution

1. Step 1: Write the proportion equation
   21,275.84 : 31,866.24 = 15,419 : x
2. Step 2: Convert to fraction form
   21,275.84/31,866.24 = 15,419/x
3. Step 3: Cross multiply
   21,275.84x = 31,866.24 × 15,419
4. Step 4: Simplify right side
   21,275.84x = 491,345,554.56
5. Step 5: Solve for x
   x = 491,345,554.56/21,275.84
6. Step 6: Final answer
   x = 23,094.06