Finding the Fourth Proportional to 2,632,752, 3,949,128 and 638,208

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632,752 : 3,949,128 = 638,208 : x
2. Step 2: Convert to fraction form
   2,632,752/3,949,128 = 638,208/x
3. Step 3: Cross multiply
   2,632,752x = 3,949,128 × 638,208
4. Step 4: Simplify right side
   2,632,752x = 2,520,365,082,624
5. Step 5: Solve for x
   x = 2,520,365,082,624/2,632,752
6. Step 6: Final answer
   x = 957,312