Finding the Third Proportional to 5,578,317 and 8,613,513

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578,317 : 8,613,513 = 8,613,513 : x
2. Step 2: Convert to fraction form
   5,578,317/8,613,513 = 8,613,513/x
3. Step 3: Cross multiply
   5,578,317x = 8,613,513 × 8,613,513
4. Step 4: Simplify right side
   5,578,317x = 74,192,606,201,169
5. Step 5: Solve for x
   x = 74,192,606,201,169/5,578,317
6. Step 6: Final answer
   x = 13,300,177.49