Finding the Third Proportional to 657,240 and 1,399,224

Step by Step Solution

1. Step 1: Write the proportion equation
   657,240 : 1,399,224 = 1,399,224 : x
2. Step 2: Convert to fraction form
   657,240/1,399,224 = 1,399,224/x
3. Step 3: Cross multiply
   657,240x = 1,399,224 × 1,399,224
4. Step 4: Simplify right side
   657,240x = 1,957,827,802,176
5. Step 5: Solve for x
   x = 1,957,827,802,176/657,240
6. Step 6: Final answer
   x = 2,978,862.82