Finding the Third Proportional to 645,436 and 1,402,814

Step by Step Solution

1. Step 1: Write the proportion equation
   645,436 : 1,402,814 = 1,402,814 : x
2. Step 2: Convert to fraction form
   645,436/1,402,814 = 1,402,814/x
3. Step 3: Cross multiply
   645,436x = 1,402,814 × 1,402,814
4. Step 4: Simplify right side
   645,436x = 1,967,887,118,596
5. Step 5: Solve for x
   x = 1,967,887,118,596/645,436
6. Step 6: Final answer
   x = 3,048,926.80