Finding the Third Proportional to 61,357.50 and 71,715.38

Step by Step Solution

1. Step 1: Write the proportion equation
   61,357.50 : 71,715.38 = 71,715.38 : x
2. Step 2: Convert to fraction form
   61,357.50/71,715.38 = 71,715.38/x
3. Step 3: Cross multiply
   61,357.50x = 71,715.38 × 71,715.38
4. Step 4: Simplify right side
   61,357.50x = 5,143,095,011.39
5. Step 5: Solve for x
   x = 5,143,095,011.39/61,357.50
6. Step 6: Final answer
   x = 83,821.78