Finding the Fourth Proportional to 282,409, 389,724.42 and 155,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   282,409 : 389,724.42 = 155,086.72 : x
2. Step 2: Convert to fraction form
   282,409/389,724.42 = 155,086.72/x
3. Step 3: Cross multiply
   282,409x = 389,724.42 × 155,086.72
4. Step 4: Simplify right side
   282,409x = 60,441,082,001.70
5. Step 5: Solve for x
   x = 60,441,082,001.70/282,409
6. Step 6: Final answer
   x = 214,019.67