Finding the Fourth Proportional to 12,469.89, 17,203.02 and 8,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.89 : 17,203.02 = 8,215.50 : x
2. Step 2: Convert to fraction form
   12,469.89/17,203.02 = 8,215.50/x
3. Step 3: Cross multiply
   12,469.89x = 17,203.02 × 8,215.50
4. Step 4: Simplify right side
   12,469.89x = 141,331,410.81
5. Step 5: Solve for x
   x = 141,331,410.81/12,469.89
6. Step 6: Final answer
   x = 11,333.81