Finding the Fourth Proportional to 11,404.28, 15,677.48 and 9,805.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,404.28 : 15,677.48 = 9,805.03 : x
2. Step 2: Convert to fraction form
   11,404.28/15,677.48 = 9,805.03/x
3. Step 3: Cross multiply
   11,404.28x = 15,677.48 × 9,805.03
4. Step 4: Simplify right side
   11,404.28x = 153,718,161.72
5. Step 5: Solve for x
   x = 153,718,161.72/11,404.28
6. Step 6: Final answer
   x = 13,478.99