Finding the Third Proportional to 39,991.50 and 59,708.25

Step by Step Solution

1. Step 1: Write the proportion equation
   39,991.50 : 59,708.25 = 59,708.25 : x
2. Step 2: Convert to fraction form
   39,991.50/59,708.25 = 59,708.25/x
3. Step 3: Cross multiply
   39,991.50x = 59,708.25 × 59,708.25
4. Step 4: Simplify right side
   39,991.50x = 3,565,075,118.06
5. Step 5: Solve for x
   x = 3,565,075,118.06/39,991.50
6. Step 6: Final answer
   x = 89,145.82