Finding the Third Proportional to 8,547,123 and 13,216,661

Step by Step Solution

1. Step 1: Write the proportion equation
   8,547,123 : 13,216,661 = 13,216,661 : x
2. Step 2: Convert to fraction form
   8,547,123/13,216,661 = 13,216,661/x
3. Step 3: Cross multiply
   8,547,123x = 13,216,661 × 13,216,661
4. Step 4: Simplify right side
   8,547,123x = 174,680,127,988,921
5. Step 5: Solve for x
   x = 174,680,127,988,921/8,547,123
6. Step 6: Final answer
   x = 20,437,301.30