Finding the Third Proportional to 39,693.38 and 56,421.56

Step by Step Solution

1. Step 1: Write the proportion equation
   39,693.38 : 56,421.56 = 56,421.56 : x
2. Step 2: Convert to fraction form
   39,693.38/56,421.56 = 56,421.56/x
3. Step 3: Cross multiply
   39,693.38x = 56,421.56 × 56,421.56
4. Step 4: Simplify right side
   39,693.38x = 3,183,392,714.94
5. Step 5: Solve for x
   x = 3,183,392,714.94/39,693.38
6. Step 6: Final answer
   x = 80,199.60