Finding the Third Proportional to 18,428.34 and 39,485.81

Step by Step Solution

1. Step 1: Write the proportion equation
   18,428.34 : 39,485.81 = 39,485.81 : x
2. Step 2: Convert to fraction form
   18,428.34/39,485.81 = 39,485.81/x
3. Step 3: Cross multiply
   18,428.34x = 39,485.81 × 39,485.81
4. Step 4: Simplify right side
   18,428.34x = 1,559,129,388.79
5. Step 5: Solve for x
   x = 1,559,129,388.79/18,428.34
6. Step 6: Final answer
   x = 84,604.97