Finding the Fourth Proportional to 285,727.34, 428,614.34 and 143,499.46

Step by Step Solution

1. Step 1: Write the proportion equation
   285,727.34 : 428,614.34 = 143,499.46 : x
2. Step 2: Convert to fraction form
   285,727.34/428,614.34 = 143,499.46/x
3. Step 3: Cross multiply
   285,727.34x = 428,614.34 × 143,499.46
4. Step 4: Simplify right side
   285,727.34x = 61,505,923,477.69
5. Step 5: Solve for x
   x = 61,505,923,477.69/285,727.34
6. Step 6: Final answer
   x = 215,260.90