Finding the Fourth Proportional to 213,474.03, 320,199.50 and 108,290.27

Step by Step Solution

1. Step 1: Write the proportion equation
   213,474.03 : 320,199.50 = 108,290.27 : x
2. Step 2: Convert to fraction form
   213,474.03/320,199.50 = 108,290.27/x
3. Step 3: Cross multiply
   213,474.03x = 320,199.50 × 108,290.27
4. Step 4: Simplify right side
   213,474.03x = 34,674,488,978.59
5. Step 5: Solve for x
   x = 34,674,488,978.59/213,474.03
6. Step 6: Final answer
   x = 162,429.54