Finding the Third Proportional to 11,891.81 and 26,137.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,891.81 : 26,137.69 = 26,137.69 : x
2. Step 2: Convert to fraction form
   11,891.81/26,137.69 = 26,137.69/x
3. Step 3: Cross multiply
   11,891.81x = 26,137.69 × 26,137.69
4. Step 4: Simplify right side
   11,891.81x = 683,178,707.85
5. Step 5: Solve for x
   x = 683,178,707.85/11,891.81
6. Step 6: Final answer
   x = 57,449.50