Finding the Third Proportional to 648,240 and 1,400,342

Step by Step Solution

1. Step 1: Write the proportion equation
   648,240 : 1,400,342 = 1,400,342 : x
2. Step 2: Convert to fraction form
   648,240/1,400,342 = 1,400,342/x
3. Step 3: Cross multiply
   648,240x = 1,400,342 × 1,400,342
4. Step 4: Simplify right side
   648,240x = 1,960,957,716,964
5. Step 5: Solve for x
   x = 1,960,957,716,964/648,240
6. Step 6: Final answer
   x = 3,025,048.93