Finding the Third Proportional to 5,139 and 11,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139 : 11,086.50 = 11,086.50 : x
2. Step 2: Convert to fraction form
   5,139/11,086.50 = 11,086.50/x
3. Step 3: Cross multiply
   5,139x = 11,086.50 × 11,086.50
4. Step 4: Simplify right side
   5,139x = 122,910,482.25
5. Step 5: Solve for x
   x = 122,910,482.25/5,139
6. Step 6: Final answer
   x = 23,917.20