Finding the Fourth Proportional to 5,279.72, 7,919.40 and 1,384.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,279.72 : 7,919.40 = 1,384.10 : x
2. Step 2: Convert to fraction form
   5,279.72/7,919.40 = 1,384.10/x
3. Step 3: Cross multiply
   5,279.72x = 7,919.40 × 1,384.10
4. Step 4: Simplify right side
   5,279.72x = 10,961,241.54
5. Step 5: Solve for x
   x = 10,961,241.54/5,279.72
6. Step 6: Final answer
   x = 2,076.10