Finding the Third Proportional to 65,019 and 91,318.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,019 : 91,318.50 = 91,318.50 : x
2. Step 2: Convert to fraction form
   65,019/91,318.50 = 91,318.50/x
3. Step 3: Cross multiply
   65,019x = 91,318.50 × 91,318.50
4. Step 4: Simplify right side
   65,019x = 8,339,068,442.25
5. Step 5: Solve for x
   x = 8,339,068,442.25/65,019
6. Step 6: Final answer
   x = 128,255.87