Finding the Third Proportional to 72,487.50 and 86,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,487.50 : 86,845.50 = 86,845.50 : x
2. Step 2: Convert to fraction form
   72,487.50/86,845.50 = 86,845.50/x
3. Step 3: Cross multiply
   72,487.50x = 86,845.50 × 86,845.50
4. Step 4: Simplify right side
   72,487.50x = 7,542,140,870.25
5. Step 5: Solve for x
   x = 7,542,140,870.25/72,487.50
6. Step 6: Final answer
   x = 104,047.47