Finding the Third Proportional to 39,457 and 55,499

Step by Step Solution

1. Step 1: Write the proportion equation
   39,457 : 55,499 = 55,499 : x
2. Step 2: Convert to fraction form
   39,457/55,499 = 55,499/x
3. Step 3: Cross multiply
   39,457x = 55,499 × 55,499
4. Step 4: Simplify right side
   39,457x = 3,080,139,001
5. Step 5: Solve for x
   x = 3,080,139,001/39,457
6. Step 6: Final answer
   x = 78,063.18