Finding the Fourth Proportional to 2,812.38, 4,216.29 and 1,170.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,812.38 : 4,216.29 = 1,170.15 : x
2. Step 2: Convert to fraction form
   2,812.38/4,216.29 = 1,170.15/x
3. Step 3: Cross multiply
   2,812.38x = 4,216.29 × 1,170.15
4. Step 4: Simplify right side
   2,812.38x = 4,933,707.12
5. Step 5: Solve for x
   x = 4,933,707.12/2,812.38
6. Step 6: Final answer
   x = 1,754.28