Finding the Third Proportional to 39,921.75 and 59,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,921.75 : 59,890.50 = 59,890.50 : x
2. Step 2: Convert to fraction form
   39,921.75/59,890.50 = 59,890.50/x
3. Step 3: Cross multiply
   39,921.75x = 59,890.50 × 59,890.50
4. Step 4: Simplify right side
   39,921.75x = 3,586,871,990.25
5. Step 5: Solve for x
   x = 3,586,871,990.25/39,921.75
6. Step 6: Final answer
   x = 89,847.56