Finding the Fourth Proportional to 490,870.88, 735,227.04 and 405,665.36

Step by Step Solution

1. Step 1: Write the proportion equation
   490,870.88 : 735,227.04 = 405,665.36 : x
2. Step 2: Convert to fraction form
   490,870.88/735,227.04 = 405,665.36/x
3. Step 3: Cross multiply
   490,870.88x = 735,227.04 × 405,665.36
4. Step 4: Simplify right side
   490,870.88x = 298,256,141,863.33
5. Step 5: Solve for x
   x = 298,256,141,863.33/490,870.88
6. Step 6: Final answer
   x = 607,606.10