Finding the Third Proportional to 71,286 and 99,658.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,286 : 99,658.50 = 99,658.50 : x
2. Step 2: Convert to fraction form
   71,286/99,658.50 = 99,658.50/x
3. Step 3: Cross multiply
   71,286x = 99,658.50 × 99,658.50
4. Step 4: Simplify right side
   71,286x = 9,931,816,622.25
5. Step 5: Solve for x
   x = 9,931,816,622.25/71,286
6. Step 6: Final answer
   x = 139,323.52