Finding the Third Proportional to 2,143,078 and 2,918,465

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,078 : 2,918,465 = 2,918,465 : x
2. Step 2: Convert to fraction form
   2,143,078/2,918,465 = 2,918,465/x
3. Step 3: Cross multiply
   2,143,078x = 2,918,465 × 2,918,465
4. Step 4: Simplify right side
   2,143,078x = 8,517,437,956,225
5. Step 5: Solve for x
   x = 8,517,437,956,225/2,143,078
6. Step 6: Final answer
   x = 3,974,394.75