Finding the Third Proportional to 18,617.91 and 39,900.94

Step by Step Solution

1. Step 1: Write the proportion equation
   18,617.91 : 39,900.94 = 39,900.94 : x
2. Step 2: Convert to fraction form
   18,617.91/39,900.94 = 39,900.94/x
3. Step 3: Cross multiply
   18,617.91x = 39,900.94 × 39,900.94
4. Step 4: Simplify right side
   18,617.91x = 1,592,084,813.38
5. Step 5: Solve for x
   x = 1,592,084,813.38/18,617.91
6. Step 6: Final answer
   x = 85,513.63