Finding the Fourth Proportional to 2,678.82, 4,019.99 and 947.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.82 : 4,019.99 = 947.38 : x
2. Step 2: Convert to fraction form
   2,678.82/4,019.99 = 947.38/x
3. Step 3: Cross multiply
   2,678.82x = 4,019.99 × 947.38
4. Step 4: Simplify right side
   2,678.82x = 3,808,458.13
5. Step 5: Solve for x
   x = 3,808,458.13/2,678.82
6. Step 6: Final answer
   x = 1,421.69