Finding the Third Proportional to 3,772.50 and 7,890

Step by Step Solution

1. Step 1: Write the proportion equation
   3,772.50 : 7,890 = 7,890 : x
2. Step 2: Convert to fraction form
   3,772.50/7,890 = 7,890/x
3. Step 3: Cross multiply
   3,772.50x = 7,890 × 7,890
4. Step 4: Simplify right side
   3,772.50x = 62,252,100
5. Step 5: Solve for x
   x = 62,252,100/3,772.50
6. Step 6: Final answer
   x = 16,501.55