Finding the Third Proportional to 42,712.31 and 70,687.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,712.31 : 70,687.69 = 70,687.69 : x
2. Step 2: Convert to fraction form
   42,712.31/70,687.69 = 70,687.69/x
3. Step 3: Cross multiply
   42,712.31x = 70,687.69 × 70,687.69
4. Step 4: Simplify right side
   42,712.31x = 4,996,749,164.10
5. Step 5: Solve for x
   x = 4,996,749,164.10/42,712.31
6. Step 6: Final answer
   x = 116,986.15