Finding the Fourth Proportional to 5,019.81, 7,529.78 and 2,387.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,019.81 : 7,529.78 = 2,387.60 : x
2. Step 2: Convert to fraction form
   5,019.81/7,529.78 = 2,387.60/x
3. Step 3: Cross multiply
   5,019.81x = 7,529.78 × 2,387.60
4. Step 4: Simplify right side
   5,019.81x = 17,978,053.14
5. Step 5: Solve for x
   x = 17,978,053.14/5,019.81
6. Step 6: Final answer
   x = 3,581.42