Finding the Fourth Proportional to 213,530.59, 320,291.83 and 63,771.31

Step by Step Solution

1. Step 1: Write the proportion equation
   213,530.59 : 320,291.83 = 63,771.31 : x
2. Step 2: Convert to fraction form
   213,530.59/320,291.83 = 63,771.31/x
3. Step 3: Cross multiply
   213,530.59x = 320,291.83 × 63,771.31
4. Step 4: Simplify right side
   213,530.59x = 20,425,429,581.40
5. Step 5: Solve for x
   x = 20,425,429,581.40/213,530.59
6. Step 6: Final answer
   x = 95,655.75