Finding the Fourth Proportional to 14,248.78, 19,665.71 and 9,647.47

Step by Step Solution

1. Step 1: Write the proportion equation
   14,248.78 : 19,665.71 = 9,647.47 : x
2. Step 2: Convert to fraction form
   14,248.78/19,665.71 = 9,647.47/x
3. Step 3: Cross multiply
   14,248.78x = 19,665.71 × 9,647.47
4. Step 4: Simplify right side
   14,248.78x = 189,724,475.50
5. Step 5: Solve for x
   x = 189,724,475.50/14,248.78
6. Step 6: Final answer
   x = 13,315.13