Finding the Fourth Proportional to 2,792.81, 4,187.19 and 1,405.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,792.81 : 4,187.19 = 1,405.15 : x
2. Step 2: Convert to fraction form
   2,792.81/4,187.19 = 1,405.15/x
3. Step 3: Cross multiply
   2,792.81x = 4,187.19 × 1,405.15
4. Step 4: Simplify right side
   2,792.81x = 5,883,630.03
5. Step 5: Solve for x
   x = 5,883,630.03/2,792.81
6. Step 6: Final answer
   x = 2,106.71