Finding the Fourth Proportional to 404,427.27, 604,271.82 and 390,283.61

Step by Step Solution

1. Step 1: Write the proportion equation
   404,427.27 : 604,271.82 = 390,283.61 : x
2. Step 2: Convert to fraction form
   404,427.27/604,271.82 = 390,283.61/x
3. Step 3: Cross multiply
   404,427.27x = 604,271.82 × 390,283.61
4. Step 4: Simplify right side
   404,427.27x = 235,837,384,309.51
5. Step 5: Solve for x
   x = 235,837,384,309.51/404,427.27
6. Step 6: Final answer
   x = 583,139.17