Finding the Third Proportional to 6,406.59 and 8,620.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,406.59 : 8,620.17 = 8,620.17 : x
2. Step 2: Convert to fraction form
   6,406.59/8,620.17 = 8,620.17/x
3. Step 3: Cross multiply
   6,406.59x = 8,620.17 × 8,620.17
4. Step 4: Simplify right side
   6,406.59x = 74,307,363.15
5. Step 5: Solve for x
   x = 74,307,363.15/6,406.59
6. Step 6: Final answer
   x = 11,598.58