Finding the Fourth Proportional to 2,515.48, 3,771.40 and 1,055.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.48 : 3,771.40 = 1,055.06 : x
2. Step 2: Convert to fraction form
   2,515.48/3,771.40 = 1,055.06/x
3. Step 3: Cross multiply
   2,515.48x = 3,771.40 × 1,055.06
4. Step 4: Simplify right side
   2,515.48x = 3,979,053.28
5. Step 5: Solve for x
   x = 3,979,053.28/2,515.48
6. Step 6: Final answer
   x = 1,581.83