Finding the Fourth Proportional to 213,676.79, 294,922.89 and 123,085.17

Step by Step Solution

1. Step 1: Write the proportion equation
   213,676.79 : 294,922.89 = 123,085.17 : x
2. Step 2: Convert to fraction form
   213,676.79/294,922.89 = 123,085.17/x
3. Step 3: Cross multiply
   213,676.79x = 294,922.89 × 123,085.17
4. Step 4: Simplify right side
   213,676.79x = 36,300,634,052.54
5. Step 5: Solve for x
   x = 36,300,634,052.54/213,676.79
6. Step 6: Final answer
   x = 169,885.72