Finding the Third Proportional to 623,358 and 1,345,128

Step by Step Solution

1. Step 1: Write the proportion equation
   623,358 : 1,345,128 = 1,345,128 : x
2. Step 2: Convert to fraction form
   623,358/1,345,128 = 1,345,128/x
3. Step 3: Cross multiply
   623,358x = 1,345,128 × 1,345,128
4. Step 4: Simplify right side
   623,358x = 1,809,369,336,384
5. Step 5: Solve for x
   x = 1,809,369,336,384/623,358
6. Step 6: Final answer
   x = 2,902,616.69