Finding the Fourth Proportional to 2,870.13, 4,306.37 and 1,115.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.13 : 4,306.37 = 1,115.27 : x
2. Step 2: Convert to fraction form
   2,870.13/4,306.37 = 1,115.27/x
3. Step 3: Cross multiply
   2,870.13x = 4,306.37 × 1,115.27
4. Step 4: Simplify right side
   2,870.13x = 4,802,754.31
5. Step 5: Solve for x
   x = 4,802,754.31/2,870.13
6. Step 6: Final answer
   x = 1,673.36