Finding the Fourth Proportional to 213,868.55, 295,212.33 and 123,260.69

Step by Step Solution

1. Step 1: Write the proportion equation
   213,868.55 : 295,212.33 = 123,260.69 : x
2. Step 2: Convert to fraction form
   213,868.55/295,212.33 = 123,260.69/x
3. Step 3: Cross multiply
   213,868.55x = 295,212.33 × 123,260.69
4. Step 4: Simplify right side
   213,868.55x = 36,388,074,016.25
5. Step 5: Solve for x
   x = 36,388,074,016.25/213,868.55
6. Step 6: Final answer
   x = 170,142.24