Finding the Fourth Proportional to 200,145.24, 276,105 and 123,636.81

Step by Step Solution

1. Step 1: Write the proportion equation
   200,145.24 : 276,105 = 123,636.81 : x
2. Step 2: Convert to fraction form
   200,145.24/276,105 = 123,636.81/x
3. Step 3: Cross multiply
   200,145.24x = 276,105 × 123,636.81
4. Step 4: Simplify right side
   200,145.24x = 34,136,741,425.05
5. Step 5: Solve for x
   x = 34,136,741,425.05/200,145.24
6. Step 6: Final answer
   x = 170,559.85