Finding the Fourth Proportional to 213,131.69, 319,704.39 and 111,904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   213,131.69 : 319,704.39 = 111,904.10 : x
2. Step 2: Convert to fraction form
   213,131.69/319,704.39 = 111,904.10/x
3. Step 3: Cross multiply
   213,131.69x = 319,704.39 × 111,904.10
4. Step 4: Simplify right side
   213,131.69x = 35,776,230,430.48
5. Step 5: Solve for x
   x = 35,776,230,430.48/213,131.69
6. Step 6: Final answer
   x = 167,859.75