Finding the Third Proportional to 39,420 and 59,137.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,420 : 59,137.50 = 59,137.50 : x
2. Step 2: Convert to fraction form
   39,420/59,137.50 = 59,137.50/x
3. Step 3: Cross multiply
   39,420x = 59,137.50 × 59,137.50
4. Step 4: Simplify right side
   39,420x = 3,497,243,906.25
5. Step 5: Solve for x
   x = 3,497,243,906.25/39,420
6. Step 6: Final answer
   x = 88,717.50