Finding the Fourth Proportional to 321,093.42, 481,789.56 and 143,720.42

Step by Step Solution

1. Step 1: Write the proportion equation
   321,093.42 : 481,789.56 = 143,720.42 : x
2. Step 2: Convert to fraction form
   321,093.42/481,789.56 = 143,720.42/x
3. Step 3: Cross multiply
   321,093.42x = 481,789.56 × 143,720.42
4. Step 4: Simplify right side
   321,093.42x = 69,242,997,914.82
5. Step 5: Solve for x
   x = 69,242,997,914.82/321,093.42
6. Step 6: Final answer
   x = 215,647.51