Finding the Third Proportional to 12,986,428 and 20,562,586

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986,428 : 20,562,586 = 20,562,586 : x
2. Step 2: Convert to fraction form
   12,986,428/20,562,586 = 20,562,586/x
3. Step 3: Cross multiply
   12,986,428x = 20,562,586 × 20,562,586
4. Step 4: Simplify right side
   12,986,428x = 422,819,943,007,396
5. Step 5: Solve for x
   x = 422,819,943,007,396/12,986,428
6. Step 6: Final answer
   x = 32,558,602.18