Finding the Third Proportional to 64,684 and 91,300

Step by Step Solution

1. Step 1: Write the proportion equation
   64,684 : 91,300 = 91,300 : x
2. Step 2: Convert to fraction form
   64,684/91,300 = 91,300/x
3. Step 3: Cross multiply
   64,684x = 91,300 × 91,300
4. Step 4: Simplify right side
   64,684x = 8,335,690,000
5. Step 5: Solve for x
   x = 8,335,690,000/64,684
6. Step 6: Final answer
   x = 128,867.88