Finding the Fourth Proportional to 12,801.24, 19,209.15 and 10,220.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,801.24 : 19,209.15 = 10,220.58 : x
2. Step 2: Convert to fraction form
   12,801.24/19,209.15 = 10,220.58/x
3. Step 3: Cross multiply
   12,801.24x = 19,209.15 × 10,220.58
4. Step 4: Simplify right side
   12,801.24x = 196,328,654.31
5. Step 5: Solve for x
   x = 196,328,654.31/12,801.24
6. Step 6: Final answer
   x = 15,336.69