Finding the Fourth Proportional to 2,870.51, 4,303.37 and 1,115.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.51 : 4,303.37 = 1,115.09 : x
2. Step 2: Convert to fraction form
   2,870.51/4,303.37 = 1,115.09/x
3. Step 3: Cross multiply
   2,870.51x = 4,303.37 × 1,115.09
4. Step 4: Simplify right side
   2,870.51x = 4,798,650.04
5. Step 5: Solve for x
   x = 4,798,650.04/2,870.51
6. Step 6: Final answer
   x = 1,671.71