Finding the Fourth Proportional to 5,282.72, 7,923.90 and 1,387.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,282.72 : 7,923.90 = 1,387.10 : x
2. Step 2: Convert to fraction form
   5,282.72/7,923.90 = 1,387.10/x
3. Step 3: Cross multiply
   5,282.72x = 7,923.90 × 1,387.10
4. Step 4: Simplify right side
   5,282.72x = 10,991,241.69
5. Step 5: Solve for x
   x = 10,991,241.69/5,282.72
6. Step 6: Final answer
   x = 2,080.60