Finding the Third Proportional to 62,816.50 and 70,653.50

Step by Step Solution

1. Step 1: Write the proportion equation
   62,816.50 : 70,653.50 = 70,653.50 : x
2. Step 2: Convert to fraction form
   62,816.50/70,653.50 = 70,653.50/x
3. Step 3: Cross multiply
   62,816.50x = 70,653.50 × 70,653.50
4. Step 4: Simplify right side
   62,816.50x = 4,991,917,062.25
5. Step 5: Solve for x
   x = 4,991,917,062.25/62,816.50
6. Step 6: Final answer
   x = 79,468.25