Finding the Third Proportional to 3,615.75 and 7,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.75 : 7,807.50 = 7,807.50 : x
2. Step 2: Convert to fraction form
   3,615.75/7,807.50 = 7,807.50/x
3. Step 3: Cross multiply
   3,615.75x = 7,807.50 × 7,807.50
4. Step 4: Simplify right side
   3,615.75x = 60,957,056.25
5. Step 5: Solve for x
   x = 60,957,056.25/3,615.75
6. Step 6: Final answer
   x = 16,858.76