Finding the Fourth Proportional to 404,578.71, 606,680.37 and 236,147.76

Step by Step Solution

1. Step 1: Write the proportion equation
   404,578.71 : 606,680.37 = 236,147.76 : x
2. Step 2: Convert to fraction form
   404,578.71/606,680.37 = 236,147.76/x
3. Step 3: Cross multiply
   404,578.71x = 606,680.37 × 236,147.76
4. Step 4: Simplify right side
   404,578.71x = 143,266,210,411.47
5. Step 5: Solve for x
   x = 143,266,210,411.47/404,578.71
6. Step 6: Final answer
   x = 354,112.08