Finding the Third Proportional to 645,516 and 1,367,820

Step by Step Solution

1. Step 1: Write the proportion equation
   645,516 : 1,367,820 = 1,367,820 : x
2. Step 2: Convert to fraction form
   645,516/1,367,820 = 1,367,820/x
3. Step 3: Cross multiply
   645,516x = 1,367,820 × 1,367,820
4. Step 4: Simplify right side
   645,516x = 1,870,931,552,400
5. Step 5: Solve for x
   x = 1,870,931,552,400/645,516
6. Step 6: Final answer
   x = 2,898,350.39