Finding the Third Proportional to 2,391 and 5,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391 : 5,148.50 = 5,148.50 : x
2. Step 2: Convert to fraction form
   2,391/5,148.50 = 5,148.50/x
3. Step 3: Cross multiply
   2,391x = 5,148.50 × 5,148.50
4. Step 4: Simplify right side
   2,391x = 26,507,052.25
5. Step 5: Solve for x
   x = 26,507,052.25/2,391
6. Step 6: Final answer
   x = 11,086.18