Finding the Fourth Proportional to 1,947.81, 2,684.77 and 1,380.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.81 : 2,684.77 = 1,380.83 : x
2. Step 2: Convert to fraction form
   1,947.81/2,684.77 = 1,380.83/x
3. Step 3: Cross multiply
   1,947.81x = 2,684.77 × 1,380.83
4. Step 4: Simplify right side
   1,947.81x = 3,707,210.96
5. Step 5: Solve for x
   x = 3,707,210.96/1,947.81
6. Step 6: Final answer
   x = 1,903.28