Finding the Third Proportional to 4,207,126 and 9,210,308

Step by Step Solution

1. Step 1: Write the proportion equation
   4,207,126 : 9,210,308 = 9,210,308 : x
2. Step 2: Convert to fraction form
   4,207,126/9,210,308 = 9,210,308/x
3. Step 3: Cross multiply
   4,207,126x = 9,210,308 × 9,210,308
4. Step 4: Simplify right side
   4,207,126x = 84,829,773,454,864
5. Step 5: Solve for x
   x = 84,829,773,454,864/4,207,126
6. Step 6: Final answer
   x = 20,163,354.62