Finding the Third Proportional to 1,407,139 and 3,318,423

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407,139 : 3,318,423 = 3,318,423 : x
2. Step 2: Convert to fraction form
   1,407,139/3,318,423 = 3,318,423/x
3. Step 3: Cross multiply
   1,407,139x = 3,318,423 × 3,318,423
4. Step 4: Simplify right side
   1,407,139x = 11,011,931,206,929
5. Step 5: Solve for x
   x = 11,011,931,206,929/1,407,139
6. Step 6: Final answer
   x = 7,825,759.36