Finding the Fourth Proportional to 378,061.27, 521,724.23 and 208,295.39

Step by Step Solution

1. Step 1: Write the proportion equation
   378,061.27 : 521,724.23 = 208,295.39 : x
2. Step 2: Convert to fraction form
   378,061.27/521,724.23 = 208,295.39/x
3. Step 3: Cross multiply
   378,061.27x = 521,724.23 × 208,295.39
4. Step 4: Simplify right side
   378,061.27x = 108,672,751,960.30
5. Step 5: Solve for x
   x = 108,672,751,960.30/378,061.27
6. Step 6: Final answer
   x = 287,447.46