Finding the Fourth Proportional to 2,679.18, 4,019.31 and 947.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.18 : 4,019.31 = 947.94 : x
2. Step 2: Convert to fraction form
   2,679.18/4,019.31 = 947.94/x
3. Step 3: Cross multiply
   2,679.18x = 4,019.31 × 947.94
4. Step 4: Simplify right side
   2,679.18x = 3,810,064.72
5. Step 5: Solve for x
   x = 3,810,064.72/2,679.18
6. Step 6: Final answer
   x = 1,422.10