Finding the Third Proportional to 4,207,258 and 9,215,368

Step by Step Solution

1. Step 1: Write the proportion equation
   4,207,258 : 9,215,368 = 9,215,368 : x
2. Step 2: Convert to fraction form
   4,207,258/9,215,368 = 9,215,368/x
3. Step 3: Cross multiply
   4,207,258x = 9,215,368 × 9,215,368
4. Step 4: Simplify right side
   4,207,258x = 84,923,007,375,424
5. Step 5: Solve for x
   x = 84,923,007,375,424/4,207,258
6. Step 6: Final answer
   x = 20,184,882.26