Finding the Fourth Proportional to 3,387.12, 5,081.52 and 1,047

Step by Step Solution

1. Step 1: Write the proportion equation
   3,387.12 : 5,081.52 = 1,047 : x
2. Step 2: Convert to fraction form
   3,387.12/5,081.52 = 1,047/x
3. Step 3: Cross multiply
   3,387.12x = 5,081.52 × 1,047
4. Step 4: Simplify right side
   3,387.12x = 5,320,351.44
5. Step 5: Solve for x
   x = 5,320,351.44/3,387.12
6. Step 6: Final answer
   x = 1,570.76