Finding the Third Proportional to 1,407,135 and 3,318,415

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407,135 : 3,318,415 = 3,318,415 : x
2. Step 2: Convert to fraction form
   1,407,135/3,318,415 = 3,318,415/x
3. Step 3: Cross multiply
   1,407,135x = 3,318,415 × 3,318,415
4. Step 4: Simplify right side
   1,407,135x = 11,011,878,112,225
5. Step 5: Solve for x
   x = 11,011,878,112,225/1,407,135
6. Step 6: Final answer
   x = 7,825,743.88