Finding the Fourth Proportional to 2,613,336.72, 3,919,175.64 and 839,994

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613,336.72 : 3,919,175.64 = 839,994 : x
2. Step 2: Convert to fraction form
   2,613,336.72/3,919,175.64 = 839,994/x
3. Step 3: Cross multiply
   2,613,336.72x = 3,919,175.64 × 839,994
4. Step 4: Simplify right side
   2,613,336.72x = 3,292,084,022,546.16
5. Step 5: Solve for x
   x = 3,292,084,022,546.16/2,613,336.72
6. Step 6: Final answer
   x = 1,259,724.40