Finding the Third Proportional to 8,564,736 and 12,818,688

Step by Step Solution

1. Step 1: Write the proportion equation
   8,564,736 : 12,818,688 = 12,818,688 : x
2. Step 2: Convert to fraction form
   8,564,736/12,818,688 = 12,818,688/x
3. Step 3: Cross multiply
   8,564,736x = 12,818,688 × 12,818,688
4. Step 4: Simplify right side
   8,564,736x = 164,318,762,041,344
5. Step 5: Solve for x
   x = 164,318,762,041,344/8,564,736
6. Step 6: Final answer
   x = 19,185,502.28