Finding the Third Proportional to 12,886,424 and 27,789,386

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886,424 : 27,789,386 = 27,789,386 : x
2. Step 2: Convert to fraction form
   12,886,424/27,789,386 = 27,789,386/x
3. Step 3: Cross multiply
   12,886,424x = 27,789,386 × 27,789,386
4. Step 4: Simplify right side
   12,886,424x = 772,249,974,256,996
5. Step 5: Solve for x
   x = 772,249,974,256,996/12,886,424
6. Step 6: Final answer
   x = 59,927,406.88