Finding the Fourth Proportional to 213,783.79, 320,768.71 and 134,004.59

Step by Step Solution

1. Step 1: Write the proportion equation
   213,783.79 : 320,768.71 = 134,004.59 : x
2. Step 2: Convert to fraction form
   213,783.79/320,768.71 = 134,004.59/x
3. Step 3: Cross multiply
   213,783.79x = 320,768.71 × 134,004.59
4. Step 4: Simplify right side
   213,783.79x = 42,984,479,468.38
5. Step 5: Solve for x
   x = 42,984,479,468.38/213,783.79
6. Step 6: Final answer
   x = 201,065.20