Finding the Fourth Proportional to 287,725.50, 397,074.83 and 160,401.06

Step by Step Solution

1. Step 1: Write the proportion equation
   287,725.50 : 397,074.83 = 160,401.06 : x
2. Step 2: Convert to fraction form
   287,725.50/397,074.83 = 160,401.06/x
3. Step 3: Cross multiply
   287,725.50x = 397,074.83 × 160,401.06
4. Step 4: Simplify right side
   287,725.50x = 63,691,222,829.31
5. Step 5: Solve for x
   x = 63,691,222,829.31/287,725.50
6. Step 6: Final answer
   x = 221,361.06