Finding the Fourth Proportional to 213,789.92, 320,777.89 and 134,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   213,789.92 : 320,777.89 = 134,010.72 : x
2. Step 2: Convert to fraction form
   213,789.92/320,777.89 = 134,010.72/x
3. Step 3: Cross multiply
   213,789.92x = 320,777.89 × 134,010.72
4. Step 4: Simplify right side
   213,789.92x = 42,987,675,663.95
5. Step 5: Solve for x
   x = 42,987,675,663.95/213,789.92
6. Step 6: Final answer
   x = 201,074.38