Finding the Third Proportional to 1,428,145 and 2,087,486

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428,145 : 2,087,486 = 2,087,486 : x
2. Step 2: Convert to fraction form
   1,428,145/2,087,486 = 2,087,486/x
3. Step 3: Cross multiply
   1,428,145x = 2,087,486 × 2,087,486
4. Step 4: Simplify right side
   1,428,145x = 4,357,597,800,196
5. Step 5: Solve for x
   x = 4,357,597,800,196/1,428,145
6. Step 6: Final answer
   x = 3,051,229.25