Finding the Fourth Proportional to 213,968.78, 320,952.86 and 64,208.82

Step by Step Solution

1. Step 1: Write the proportion equation
   213,968.78 : 320,952.86 = 64,208.82 : x
2. Step 2: Convert to fraction form
   213,968.78/320,952.86 = 64,208.82/x
3. Step 3: Cross multiply
   213,968.78x = 320,952.86 × 64,208.82
4. Step 4: Simplify right side
   213,968.78x = 20,608,004,095.18
5. Step 5: Solve for x
   x = 20,608,004,095.18/213,968.78
6. Step 6: Final answer
   x = 96,313.14