Finding the Fourth Proportional to 10,992.79, 16,471.89 and 8,500.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,992.79 : 16,471.89 = 8,500.07 : x
2. Step 2: Convert to fraction form
   10,992.79/16,471.89 = 8,500.07/x
3. Step 3: Cross multiply
   10,992.79x = 16,471.89 × 8,500.07
4. Step 4: Simplify right side
   10,992.79x = 140,012,135.67
5. Step 5: Solve for x
   x = 140,012,135.67/10,992.79
6. Step 6: Final answer
   x = 12,736.72