Finding the Third Proportional to 1,200,213 and 2,606,485

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,213 : 2,606,485 = 2,606,485 : x
2. Step 2: Convert to fraction form
   1,200,213/2,606,485 = 2,606,485/x
3. Step 3: Cross multiply
   1,200,213x = 2,606,485 × 2,606,485
4. Step 4: Simplify right side
   1,200,213x = 6,793,764,055,225
5. Step 5: Solve for x
   x = 6,793,764,055,225/1,200,213
6. Step 6: Final answer
   x = 5,660,465.31