Finding the Fourth Proportional to 10,678.43, 14,721.90 and 7,487.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,678.43 : 14,721.90 = 7,487.42 : x
2. Step 2: Convert to fraction form
   10,678.43/14,721.90 = 7,487.42/x
3. Step 3: Cross multiply
   10,678.43x = 14,721.90 × 7,487.42
4. Step 4: Simplify right side
   10,678.43x = 110,229,048.50
5. Step 5: Solve for x
   x = 110,229,048.50/10,678.43
6. Step 6: Final answer
   x = 10,322.59