Finding the Third Proportional to 18,390.38 and 39,697.88

Step by Step Solution

1. Step 1: Write the proportion equation
   18,390.38 : 39,697.88 = 39,697.88 : x
2. Step 2: Convert to fraction form
   18,390.38/39,697.88 = 39,697.88/x
3. Step 3: Cross multiply
   18,390.38x = 39,697.88 × 39,697.88
4. Step 4: Simplify right side
   18,390.38x = 1,575,921,279.52
5. Step 5: Solve for x
   x = 1,575,921,279.52/18,390.38
6. Step 6: Final answer
   x = 85,692.72