Finding the Fourth Proportional to 743,648.56, 1,026,230.13 and 404,116.78

Step by Step Solution

1. Step 1: Write the proportion equation
   743,648.56 : 1,026,230.13 = 404,116.78 : x
2. Step 2: Convert to fraction form
   743,648.56/1,026,230.13 = 404,116.78/x
3. Step 3: Cross multiply
   743,648.56x = 1,026,230.13 × 404,116.78
4. Step 4: Simplify right side
   743,648.56x = 414,716,815,674.58
5. Step 5: Solve for x
   x = 414,716,815,674.58/743,648.56
6. Step 6: Final answer
   x = 557,678.50