Finding the Fourth Proportional to 726,890.36, 1,003,141.67 and 404,621.06

Step by Step Solution

1. Step 1: Write the proportion equation
   726,890.36 : 1,003,141.67 = 404,621.06 : x
2. Step 2: Convert to fraction form
   726,890.36/1,003,141.67 = 404,621.06/x
3. Step 3: Cross multiply
   726,890.36x = 1,003,141.67 × 404,621.06
4. Step 4: Simplify right side
   726,890.36x = 405,892,238,806.76
5. Step 5: Solve for x
   x = 405,892,238,806.76/726,890.36
6. Step 6: Final answer
   x = 558,395.41