Finding the Third Proportional to 3,889.50 and 8,392.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.50 : 8,392.50 = 8,392.50 : x
2. Step 2: Convert to fraction form
   3,889.50/8,392.50 = 8,392.50/x
3. Step 3: Cross multiply
   3,889.50x = 8,392.50 × 8,392.50
4. Step 4: Simplify right side
   3,889.50x = 70,434,056.25
5. Step 5: Solve for x
   x = 70,434,056.25/3,889.50
6. Step 6: Final answer
   x = 18,108.77