Finding the Third Proportional to 657,816 and 1,438,656

Step by Step Solution

1. Step 1: Write the proportion equation
   657,816 : 1,438,656 = 1,438,656 : x
2. Step 2: Convert to fraction form
   657,816/1,438,656 = 1,438,656/x
3. Step 3: Cross multiply
   657,816x = 1,438,656 × 1,438,656
4. Step 4: Simplify right side
   657,816x = 2,069,731,086,336
5. Step 5: Solve for x
   x = 2,069,731,086,336/657,816
6. Step 6: Final answer
   x = 3,146,367.81