Finding the Fourth Proportional to 15,588.72, 21,513.60 and 9,300.96

Step by Step Solution

1. Step 1: Write the proportion equation
   15,588.72 : 21,513.60 = 9,300.96 : x
2. Step 2: Convert to fraction form
   15,588.72/21,513.60 = 9,300.96/x
3. Step 3: Cross multiply
   15,588.72x = 21,513.60 × 9,300.96
4. Step 4: Simplify right side
   15,588.72x = 200,097,133.06
5. Step 5: Solve for x
   x = 200,097,133.06/15,588.72
6. Step 6: Final answer
   x = 12,836.02