Finding the Fourth Proportional to 15,477.75, 21,358.72 and 8,404.02

Step by Step Solution

1. Step 1: Write the proportion equation
   15,477.75 : 21,358.72 = 8,404.02 : x
2. Step 2: Convert to fraction form
   15,477.75/21,358.72 = 8,404.02/x
3. Step 3: Cross multiply
   15,477.75x = 21,358.72 × 8,404.02
4. Step 4: Simplify right side
   15,477.75x = 179,499,110.05
5. Step 5: Solve for x
   x = 179,499,110.05/15,477.75
6. Step 6: Final answer
   x = 11,597.24