Finding the Third Proportional to 621,814 and 1,342,880

Step by Step Solution

1. Step 1: Write the proportion equation
   621,814 : 1,342,880 = 1,342,880 : x
2. Step 2: Convert to fraction form
   621,814/1,342,880 = 1,342,880/x
3. Step 3: Cross multiply
   621,814x = 1,342,880 × 1,342,880
4. Step 4: Simplify right side
   621,814x = 1,803,326,694,400
5. Step 5: Solve for x
   x = 1,803,326,694,400/621,814
6. Step 6: Final answer
   x = 2,900,106.29