Finding the Third Proportional to 1,688,128 and 3,904,664

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688,128 : 3,904,664 = 3,904,664 : x
2. Step 2: Convert to fraction form
   1,688,128/3,904,664 = 3,904,664/x
3. Step 3: Cross multiply
   1,688,128x = 3,904,664 × 3,904,664
4. Step 4: Simplify right side
   1,688,128x = 15,246,400,952,896
5. Step 5: Solve for x
   x = 15,246,400,952,896/1,688,128
6. Step 6: Final answer
   x = 9,031,543.20