Finding the Fourth Proportional to 14,410.72, 19,890.56 and 9,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,410.72 : 19,890.56 = 9,388.72 : x
2. Step 2: Convert to fraction form
   14,410.72/19,890.56 = 9,388.72/x
3. Step 3: Cross multiply
   14,410.72x = 19,890.56 × 9,388.72
4. Step 4: Simplify right side
   14,410.72x = 186,746,898.48
5. Step 5: Solve for x
   x = 186,746,898.48/14,410.72
6. Step 6: Final answer
   x = 12,958.89