Finding the Fourth Proportional to 447,136.96, 616,785.72 and 281,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   447,136.96 : 616,785.72 = 281,300.72 : x
2. Step 2: Convert to fraction form
   447,136.96/616,785.72 = 281,300.72/x
3. Step 3: Cross multiply
   447,136.96x = 616,785.72 × 281,300.72
4. Step 4: Simplify right side
   447,136.96x = 173,502,267,121.72
5. Step 5: Solve for x
   x = 173,502,267,121.72/447,136.96
6. Step 6: Final answer
   x = 388,029.36