Finding the Third Proportional to 645,436 and 1,401,248

Step by Step Solution

1. Step 1: Write the proportion equation
   645,436 : 1,401,248 = 1,401,248 : x
2. Step 2: Convert to fraction form
   645,436/1,401,248 = 1,401,248/x
3. Step 3: Cross multiply
   645,436x = 1,401,248 × 1,401,248
4. Step 4: Simplify right side
   645,436x = 1,963,495,957,504
5. Step 5: Solve for x
   x = 1,963,495,957,504/645,436
6. Step 6: Final answer
   x = 3,042,123.40