Finding the Fourth Proportional to 10,991.06, 16,426.25 and 8,035.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.06 : 16,426.25 = 8,035.72 : x
2. Step 2: Convert to fraction form
   10,991.06/16,426.25 = 8,035.72/x
3. Step 3: Cross multiply
   10,991.06x = 16,426.25 × 8,035.72
4. Step 4: Simplify right side
   10,991.06x = 131,996,775.64
5. Step 5: Solve for x
   x = 131,996,775.64/10,991.06
6. Step 6: Final answer
   x = 12,009.47