Finding the Third Proportional to 64,363.50 and 86,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,363.50 : 86,980.50 = 86,980.50 : x
2. Step 2: Convert to fraction form
   64,363.50/86,980.50 = 86,980.50/x
3. Step 3: Cross multiply
   64,363.50x = 86,980.50 × 86,980.50
4. Step 4: Simplify right side
   64,363.50x = 7,565,607,380.25
5. Step 5: Solve for x
   x = 7,565,607,380.25/64,363.50
6. Step 6: Final answer
   x = 117,545.00