Finding the Fourth Proportional to 491,019.28, 677,558.72 and 276,154.76

Step by Step Solution

1. Step 1: Write the proportion equation
   491,019.28 : 677,558.72 = 276,154.76 : x
2. Step 2: Convert to fraction form
   491,019.28/677,558.72 = 276,154.76/x
3. Step 3: Cross multiply
   491,019.28x = 677,558.72 × 276,154.76
4. Step 4: Simplify right side
   491,019.28x = 187,111,065,707.51
5. Step 5: Solve for x
   x = 187,111,065,707.51/491,019.28
6. Step 6: Final answer
   x = 381,066.64