Finding the Third Proportional to 3,210.75 and 3,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,210.75 : 3,487.50 = 3,487.50 : x
2. Step 2: Convert to fraction form
   3,210.75/3,487.50 = 3,487.50/x
3. Step 3: Cross multiply
   3,210.75x = 3,487.50 × 3,487.50
4. Step 4: Simplify right side
   3,210.75x = 12,162,656.25
5. Step 5: Solve for x
   x = 12,162,656.25/3,210.75
6. Step 6: Final answer
   x = 3,788.10