Finding the Third Proportional to 4,390 and 10,494.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,390 : 10,494.50 = 10,494.50 : x
2. Step 2: Convert to fraction form
   4,390/10,494.50 = 10,494.50/x
3. Step 3: Cross multiply
   4,390x = 10,494.50 × 10,494.50
4. Step 4: Simplify right side
   4,390x = 110,134,530.25
5. Step 5: Solve for x
   x = 110,134,530.25/4,390
6. Step 6: Final answer
   x = 25,087.59