Finding the Third Proportional to 4,039.31 and 8,715.94

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039.31 : 8,715.94 = 8,715.94 : x
2. Step 2: Convert to fraction form
   4,039.31/8,715.94 = 8,715.94/x
3. Step 3: Cross multiply
   4,039.31x = 8,715.94 × 8,715.94
4. Step 4: Simplify right side
   4,039.31x = 75,967,566.50
5. Step 5: Solve for x
   x = 75,967,566.50/4,039.31
6. Step 6: Final answer
   x = 18,807.05