Finding the Fourth Proportional to 2,131,647, 3,199,746.78 and 917,824.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131,647 : 3,199,746.78 = 917,824.32 : x
2. Step 2: Convert to fraction form
   2,131,647/3,199,746.78 = 917,824.32/x
3. Step 3: Cross multiply
   2,131,647x = 3,199,746.78 × 917,824.32
4. Step 4: Simplify right side
   2,131,647x = 2,936,805,412,525.69
5. Step 5: Solve for x
   x = 2,936,805,412,525.69/2,131,647
6. Step 6: Final answer
   x = 1,377,716.58