Finding the Third Proportional to 8,615,906 and 13,516,947

Step by Step Solution

1. Step 1: Write the proportion equation
   8,615,906 : 13,516,947 = 13,516,947 : x
2. Step 2: Convert to fraction form
   8,615,906/13,516,947 = 13,516,947/x
3. Step 3: Cross multiply
   8,615,906x = 13,516,947 × 13,516,947
4. Step 4: Simplify right side
   8,615,906x = 182,707,856,200,809
5. Step 5: Solve for x
   x = 182,707,856,200,809/8,615,906
6. Step 6: Final answer
   x = 21,205,878.55