Finding the Fourth Proportional to 2,678.16, 4,018.52 and 947.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.16 : 4,018.52 = 947.60 : x
2. Step 2: Convert to fraction form
   2,678.16/4,018.52 = 947.60/x
3. Step 3: Cross multiply
   2,678.16x = 4,018.52 × 947.60
4. Step 4: Simplify right side
   2,678.16x = 3,807,949.55
5. Step 5: Solve for x
   x = 3,807,949.55/2,678.16
6. Step 6: Final answer
   x = 1,421.85