Finding the Fourth Proportional to 2,485.42, 3,727.98 and 1,387.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.42 : 3,727.98 = 1,387.32 : x
2. Step 2: Convert to fraction form
   2,485.42/3,727.98 = 1,387.32/x
3. Step 3: Cross multiply
   2,485.42x = 3,727.98 × 1,387.32
4. Step 4: Simplify right side
   2,485.42x = 5,171,901.21
5. Step 5: Solve for x
   x = 5,171,901.21/2,485.42
6. Step 6: Final answer
   x = 2,080.90