Finding the Third Proportional to 42,309 and 56,983.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,309 : 56,983.50 = 56,983.50 : x
2. Step 2: Convert to fraction form
   42,309/56,983.50 = 56,983.50/x
3. Step 3: Cross multiply
   42,309x = 56,983.50 × 56,983.50
4. Step 4: Simplify right side
   42,309x = 3,247,119,272.25
5. Step 5: Solve for x
   x = 3,247,119,272.25/42,309
6. Step 6: Final answer
   x = 76,747.72