Finding the Fourth Proportional to 404,417.32, 602,474.69 and 386,221.48

Step by Step Solution

1. Step 1: Write the proportion equation
   404,417.32 : 602,474.69 = 386,221.48 : x
2. Step 2: Convert to fraction form
   404,417.32/602,474.69 = 386,221.48/x
3. Step 3: Cross multiply
   404,417.32x = 602,474.69 × 386,221.48
4. Step 4: Simplify right side
   404,417.32x = 232,688,666,434.34
5. Step 5: Solve for x
   x = 232,688,666,434.34/404,417.32
6. Step 6: Final answer
   x = 575,367.71