Finding the Third Proportional to 4,200,921 and 8,555,934

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,921 : 8,555,934 = 8,555,934 : x
2. Step 2: Convert to fraction form
   4,200,921/8,555,934 = 8,555,934/x
3. Step 3: Cross multiply
   4,200,921x = 8,555,934 × 8,555,934
4. Step 4: Simplify right side
   4,200,921x = 73,204,006,612,356
5. Step 5: Solve for x
   x = 73,204,006,612,356/4,200,921
6. Step 6: Final answer
   x = 17,425,704.18