Finding the Third Proportional to 556,258 and 1,211,660

Step by Step Solution

1. Step 1: Write the proportion equation
   556,258 : 1,211,660 = 1,211,660 : x
2. Step 2: Convert to fraction form
   556,258/1,211,660 = 1,211,660/x
3. Step 3: Cross multiply
   556,258x = 1,211,660 × 1,211,660
4. Step 4: Simplify right side
   556,258x = 1,468,119,955,600
5. Step 5: Solve for x
   x = 1,468,119,955,600/556,258
6. Step 6: Final answer
   x = 2,639,278.82