Finding the Third Proportional to 645,416 and 1,402,774

Step by Step Solution

1. Step 1: Write the proportion equation
   645,416 : 1,402,774 = 1,402,774 : x
2. Step 2: Convert to fraction form
   645,416/1,402,774 = 1,402,774/x
3. Step 3: Cross multiply
   645,416x = 1,402,774 × 1,402,774
4. Step 4: Simplify right side
   645,416x = 1,967,774,895,076
5. Step 5: Solve for x
   x = 1,967,774,895,076/645,416
6. Step 6: Final answer
   x = 3,048,847.40