Finding the Fourth Proportional to 1,096,665.86, 1,644,459.29 and 386,590.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096,665.86 : 1,644,459.29 = 386,590.70 : x
2. Step 2: Convert to fraction form
   1,096,665.86/1,644,459.29 = 386,590.70/x
3. Step 3: Cross multiply
   1,096,665.86x = 1,644,459.29 × 386,590.70
4. Step 4: Simplify right side
   1,096,665.86x = 635,732,668,042.60
5. Step 5: Solve for x
   x = 635,732,668,042.60/1,096,665.86
6. Step 6: Final answer
   x = 579,695.87