Finding the Fourth Proportional to 22,636.76, 31,238.72 and 13,203.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,636.76 : 31,238.72 = 13,203.50 : x
2. Step 2: Convert to fraction form
   22,636.76/31,238.72 = 13,203.50/x
3. Step 3: Cross multiply
   22,636.76x = 31,238.72 × 13,203.50
4. Step 4: Simplify right side
   22,636.76x = 412,460,439.52
5. Step 5: Solve for x
   x = 412,460,439.52/22,636.76
6. Step 6: Final answer
   x = 18,220.82