Finding the Third Proportional to 18,988.17 and 39,491.30

Step by Step Solution

1. Step 1: Write the proportion equation
   18,988.17 : 39,491.30 = 39,491.30 : x
2. Step 2: Convert to fraction form
   18,988.17/39,491.30 = 39,491.30/x
3. Step 3: Cross multiply
   18,988.17x = 39,491.30 × 39,491.30
4. Step 4: Simplify right side
   18,988.17x = 1,559,562,528.87
5. Step 5: Solve for x
   x = 1,559,562,528.87/18,988.17
6. Step 6: Final answer
   x = 82,133.37