Finding the Fourth Proportional to 1,555,231, 2,146,218.78 and 839,839

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555,231 : 2,146,218.78 = 839,839 : x
2. Step 2: Convert to fraction form
   1,555,231/2,146,218.78 = 839,839/x
3. Step 3: Cross multiply
   1,555,231x = 2,146,218.78 × 839,839
4. Step 4: Simplify right side
   1,555,231x = 1,802,478,233,976.42
5. Step 5: Solve for x
   x = 1,802,478,233,976.42/1,555,231
6. Step 6: Final answer
   x = 1,158,977.82