Finding the Fourth Proportional to 2,678.76, 4,019.76 and 947.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.76 : 4,019.76 = 947.25 : x
2. Step 2: Convert to fraction form
   2,678.76/4,019.76 = 947.25/x
3. Step 3: Cross multiply
   2,678.76x = 4,019.76 × 947.25
4. Step 4: Simplify right side
   2,678.76x = 3,807,717.66
5. Step 5: Solve for x
   x = 3,807,717.66/2,678.76
6. Step 6: Final answer
   x = 1,421.45