Finding the Fourth Proportional to 10,999.43, 16,501.89 and 4,426.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.43 : 16,501.89 = 4,426.14 : x
2. Step 2: Convert to fraction form
   10,999.43/16,501.89 = 4,426.14/x
3. Step 3: Cross multiply
   10,999.43x = 16,501.89 × 4,426.14
4. Step 4: Simplify right side
   10,999.43x = 73,039,753.88
5. Step 5: Solve for x
   x = 73,039,753.88/10,999.43
6. Step 6: Final answer
   x = 6,640.32