Finding the Fourth Proportional to 200,421.20, 276,581.33 and 109,778.69

Step by Step Solution

1. Step 1: Write the proportion equation
   200,421.20 : 276,581.33 = 109,778.69 : x
2. Step 2: Convert to fraction form
   200,421.20/276,581.33 = 109,778.69/x
3. Step 3: Cross multiply
   200,421.20x = 276,581.33 × 109,778.69
4. Step 4: Simplify right side
   200,421.20x = 30,362,734,154.06
5. Step 5: Solve for x
   x = 30,362,734,154.06/200,421.20
6. Step 6: Final answer
   x = 151,494.63