Finding the Fourth Proportional to 377,959, 521,583.42 and 208,192.72

Step by Step Solution

1. Step 1: Write the proportion equation
   377,959 : 521,583.42 = 208,192.72 : x
2. Step 2: Convert to fraction form
   377,959/521,583.42 = 208,192.72/x
3. Step 3: Cross multiply
   377,959x = 521,583.42 × 208,192.72
4. Step 4: Simplify right side
   377,959x = 108,589,870,916.70
5. Step 5: Solve for x
   x = 108,589,870,916.70/377,959
6. Step 6: Final answer
   x = 287,305.95