Finding the Fourth Proportional to 2,679.92, 4,018.72 and 948.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.92 : 4,018.72 = 948.16 : x
2. Step 2: Convert to fraction form
   2,679.92/4,018.72 = 948.16/x
3. Step 3: Cross multiply
   2,679.92x = 4,018.72 × 948.16
4. Step 4: Simplify right side
   2,679.92x = 3,810,389.56
5. Step 5: Solve for x
   x = 3,810,389.56/2,679.92
6. Step 6: Final answer
   x = 1,421.83