Finding the Third Proportional to 64,237.50 and 91,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,237.50 : 91,309.50 = 91,309.50 : x
2. Step 2: Convert to fraction form
   64,237.50/91,309.50 = 91,309.50/x
3. Step 3: Cross multiply
   64,237.50x = 91,309.50 × 91,309.50
4. Step 4: Simplify right side
   64,237.50x = 8,337,424,790.25
5. Step 5: Solve for x
   x = 8,337,424,790.25/64,237.50
6. Step 6: Final answer
   x = 129,790.62