Finding the Third Proportional to 646,528 and 1,413,440

Step by Step Solution

1. Step 1: Write the proportion equation
   646,528 : 1,413,440 = 1,413,440 : x
2. Step 2: Convert to fraction form
   646,528/1,413,440 = 1,413,440/x
3. Step 3: Cross multiply
   646,528x = 1,413,440 × 1,413,440
4. Step 4: Simplify right side
   646,528x = 1,997,812,633,600
5. Step 5: Solve for x
   x = 1,997,812,633,600/646,528
6. Step 6: Final answer
   x = 3,090,063.59