Finding the Third Proportional to 56,712 and 68,315.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,712 : 68,315.50 = 68,315.50 : x
2. Step 2: Convert to fraction form
   56,712/68,315.50 = 68,315.50/x
3. Step 3: Cross multiply
   56,712x = 68,315.50 × 68,315.50
4. Step 4: Simplify right side
   56,712x = 4,667,007,540.25
5. Step 5: Solve for x
   x = 4,667,007,540.25/56,712
6. Step 6: Final answer
   x = 82,293.12