Finding the Third Proportional to 5,110.50 and 7,143.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,110.50 : 7,143.75 = 7,143.75 : x
2. Step 2: Convert to fraction form
   5,110.50/7,143.75 = 7,143.75/x
3. Step 3: Cross multiply
   5,110.50x = 7,143.75 × 7,143.75
4. Step 4: Simplify right side
   5,110.50x = 51,033,164.06
5. Step 5: Solve for x
   x = 51,033,164.06/5,110.50
6. Step 6: Final answer
   x = 9,985.94