Finding the Third Proportional to 39,429 and 56,676.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,429 : 56,676.50 = 56,676.50 : x
2. Step 2: Convert to fraction form
   39,429/56,676.50 = 56,676.50/x
3. Step 3: Cross multiply
   39,429x = 56,676.50 × 56,676.50
4. Step 4: Simplify right side
   39,429x = 3,212,225,652.25
5. Step 5: Solve for x
   x = 3,212,225,652.25/39,429
6. Step 6: Final answer
   x = 81,468.61