Finding the Fourth Proportional to 909,192, 1,363,842.69 and 278,111.28

Step by Step Solution

1. Step 1: Write the proportion equation
   909,192 : 1,363,842.69 = 278,111.28 : x
2. Step 2: Convert to fraction form
   909,192/1,363,842.69 = 278,111.28/x
3. Step 3: Cross multiply
   909,192x = 1,363,842.69 × 278,111.28
4. Step 4: Simplify right side
   909,192x = 379,300,036,234.54
5. Step 5: Solve for x
   x = 379,300,036,234.54/909,192
6. Step 6: Final answer
   x = 417,183.65