Finding the Third Proportional to 18,069 and 39,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,069 : 39,415.50 = 39,415.50 : x
2. Step 2: Convert to fraction form
   18,069/39,415.50 = 39,415.50/x
3. Step 3: Cross multiply
   18,069x = 39,415.50 × 39,415.50
4. Step 4: Simplify right side
   18,069x = 1,553,581,640.25
5. Step 5: Solve for x
   x = 1,553,581,640.25/18,069
6. Step 6: Final answer
   x = 85,980.50