Finding the Third Proportional to 5,709,615 and 8,406,715

Step by Step Solution

1. Step 1: Write the proportion equation
   5,709,615 : 8,406,715 = 8,406,715 : x
2. Step 2: Convert to fraction form
   5,709,615/8,406,715 = 8,406,715/x
3. Step 3: Cross multiply
   5,709,615x = 8,406,715 × 8,406,715
4. Step 4: Simplify right side
   5,709,615x = 70,672,857,091,225
5. Step 5: Solve for x
   x = 70,672,857,091,225/5,709,615
6. Step 6: Final answer
   x = 12,377,867.35