Finding the Fourth Proportional to 379,100.52, 523,151.73 and 209,331

Step by Step Solution

1. Step 1: Write the proportion equation
   379,100.52 : 523,151.73 = 209,331 : x
2. Step 2: Convert to fraction form
   379,100.52/523,151.73 = 209,331/x
3. Step 3: Cross multiply
   379,100.52x = 523,151.73 × 209,331
4. Step 4: Simplify right side
   379,100.52x = 109,511,874,792.63
5. Step 5: Solve for x
   x = 109,511,874,792.63/379,100.52
6. Step 6: Final answer
   x = 288,872.92