Finding the Fourth Proportional to 15,624.72, 21,558.77 and 9,253.31

Step by Step Solution

1. Step 1: Write the proportion equation
   15,624.72 : 21,558.77 = 9,253.31 : x
2. Step 2: Convert to fraction form
   15,624.72/21,558.77 = 9,253.31/x
3. Step 3: Cross multiply
   15,624.72x = 21,558.77 × 9,253.31
4. Step 4: Simplify right side
   15,624.72x = 199,489,982.03
5. Step 5: Solve for x
   x = 199,489,982.03/15,624.72
6. Step 6: Final answer
   x = 12,767.59