Finding the Third Proportional to 39,557.74 and 86,625.70

Step by Step Solution

1. Step 1: Write the proportion equation
   39,557.74 : 86,625.70 = 86,625.70 : x
2. Step 2: Convert to fraction form
   39,557.74/86,625.70 = 86,625.70/x
3. Step 3: Cross multiply
   39,557.74x = 86,625.70 × 86,625.70
4. Step 4: Simplify right side
   39,557.74x = 7,504,012,441.90
5. Step 5: Solve for x
   x = 7,504,012,441.90/39,557.74
6. Step 6: Final answer
   x = 189,697.69