Finding the Fourth Proportional to 1,055,086.56, 1,582,631.82 and 256,368.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055,086.56 : 1,582,631.82 = 256,368.78 : x
2. Step 2: Convert to fraction form
   1,055,086.56/1,582,631.82 = 256,368.78/x
3. Step 3: Cross multiply
   1,055,086.56x = 1,582,631.82 × 256,368.78
4. Step 4: Simplify right side
   1,055,086.56x = 405,737,388,882.58
5. Step 5: Solve for x
   x = 405,737,388,882.58/1,055,086.56
6. Step 6: Final answer
   x = 384,553.65