Finding the Third Proportional to 2,390.77 and 5,206.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.77 : 5,206.15 = 5,206.15 : x
2. Step 2: Convert to fraction form
   2,390.77/5,206.15 = 5,206.15/x
3. Step 3: Cross multiply
   2,390.77x = 5,206.15 × 5,206.15
4. Step 4: Simplify right side
   2,390.77x = 27,103,981.55
5. Step 5: Solve for x
   x = 27,103,981.55/2,390.77
6. Step 6: Final answer
   x = 11,336.95