Finding the Fourth Proportional to 287,581.50, 396,870.59 and 160,265.30

Step by Step Solution

1. Step 1: Write the proportion equation
   287,581.50 : 396,870.59 = 160,265.30 : x
2. Step 2: Convert to fraction form
   287,581.50/396,870.59 = 160,265.30/x
3. Step 3: Cross multiply
   287,581.50x = 396,870.59 × 160,265.30
4. Step 4: Simplify right side
   287,581.50x = 63,604,581,381.85
5. Step 5: Solve for x
   x = 63,604,581,381.85/287,581.50
6. Step 6: Final answer
   x = 221,170.63