Finding the Third Proportional to 6,416,172 and 8,716,639

Step by Step Solution

1. Step 1: Write the proportion equation
   6,416,172 : 8,716,639 = 8,716,639 : x
2. Step 2: Convert to fraction form
   6,416,172/8,716,639 = 8,716,639/x
3. Step 3: Cross multiply
   6,416,172x = 8,716,639 × 8,716,639
4. Step 4: Simplify right side
   6,416,172x = 75,979,795,456,321
5. Step 5: Solve for x
   x = 75,979,795,456,321/6,416,172
6. Step 6: Final answer
   x = 11,841,919.99