Finding the Fourth Proportional to 2,678.16, 4,018.56 and 1,292.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.16 : 4,018.56 = 1,292.67 : x
2. Step 2: Convert to fraction form
   2,678.16/4,018.56 = 1,292.67/x
3. Step 3: Cross multiply
   2,678.16x = 4,018.56 × 1,292.67
4. Step 4: Simplify right side
   2,678.16x = 5,194,671.96
5. Step 5: Solve for x
   x = 5,194,671.96/2,678.16
6. Step 6: Final answer
   x = 1,939.64