Finding the Fourth Proportional to 15,449.10, 21,337.28 and 10,404.56

Step by Step Solution

1. Step 1: Write the proportion equation
   15,449.10 : 21,337.28 = 10,404.56 : x
2. Step 2: Convert to fraction form
   15,449.10/21,337.28 = 10,404.56/x
3. Step 3: Cross multiply
   15,449.10x = 21,337.28 × 10,404.56
4. Step 4: Simplify right side
   15,449.10x = 222,004,851.29
5. Step 5: Solve for x
   x = 222,004,851.29/15,449.10
6. Step 6: Final answer
   x = 14,370.08