Finding the Fourth Proportional to 3,870, 5,796.72 and 3,287.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870 : 5,796.72 = 3,287.52 : x
2. Step 2: Convert to fraction form
   3,870/5,796.72 = 3,287.52/x
3. Step 3: Cross multiply
   3,870x = 5,796.72 × 3,287.52
4. Step 4: Simplify right side
   3,870x = 19,056,832.93
5. Step 5: Solve for x
   x = 19,056,832.93/3,870
6. Step 6: Final answer
   x = 4,924.25