Finding the Fourth Proportional to 15,477.62, 21,359.31 and 8,404.16

Step by Step Solution

1. Step 1: Write the proportion equation
   15,477.62 : 21,359.31 = 8,404.16 : x
2. Step 2: Convert to fraction form
   15,477.62/21,359.31 = 8,404.16/x
3. Step 3: Cross multiply
   15,477.62x = 21,359.31 × 8,404.16
4. Step 4: Simplify right side
   15,477.62x = 179,507,058.73
5. Step 5: Solve for x
   x = 179,507,058.73/15,477.62
6. Step 6: Final answer
   x = 11,597.85