Finding the Third Proportional to 7,839 and 10,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,839 : 10,870.50 = 10,870.50 : x
2. Step 2: Convert to fraction form
   7,839/10,870.50 = 10,870.50/x
3. Step 3: Cross multiply
   7,839x = 10,870.50 × 10,870.50
4. Step 4: Simplify right side
   7,839x = 118,167,770.25
5. Step 5: Solve for x
   x = 118,167,770.25/7,839
6. Step 6: Final answer
   x = 15,074.34