Finding the Fourth Proportional to 443,456.55, 665,282.03 and 143,886.15

Step by Step Solution

1. Step 1: Write the proportion equation
   443,456.55 : 665,282.03 = 143,886.15 : x
2. Step 2: Convert to fraction form
   443,456.55/665,282.03 = 143,886.15/x
3. Step 3: Cross multiply
   443,456.55x = 665,282.03 × 143,886.15
4. Step 4: Simplify right side
   443,456.55x = 95,724,869,960.88
5. Step 5: Solve for x
   x = 95,724,869,960.88/443,456.55
6. Step 6: Final answer
   x = 215,860.76