Finding the Fourth Proportional to 15,533.10, 21,436.25 and 9,164.07

Step by Step Solution

1. Step 1: Write the proportion equation
   15,533.10 : 21,436.25 = 9,164.07 : x
2. Step 2: Convert to fraction form
   15,533.10/21,436.25 = 9,164.07/x
3. Step 3: Cross multiply
   15,533.10x = 21,436.25 × 9,164.07
4. Step 4: Simplify right side
   15,533.10x = 196,443,249.72
5. Step 5: Solve for x
   x = 196,443,249.72/15,533.10
6. Step 6: Final answer
   x = 12,646.75