Finding the Fourth Proportional to 1,096,665.36, 1,644,458.54 and 386,590.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096,665.36 : 1,644,458.54 = 386,590.20 : x
2. Step 2: Convert to fraction form
   1,096,665.36/1,644,458.54 = 386,590.20/x
3. Step 3: Cross multiply
   1,096,665.36x = 1,644,458.54 × 386,590.20
4. Step 4: Simplify right side
   1,096,665.36x = 635,731,555,870.31
5. Step 5: Solve for x
   x = 635,731,555,870.31/1,096,665.36
6. Step 6: Final answer
   x = 579,695.12