Finding the Fourth Proportional to 1,947.09, 2,683.86 and 1,317.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.09 : 2,683.86 = 1,317.42 : x
2. Step 2: Convert to fraction form
   1,947.09/2,683.86 = 1,317.42/x
3. Step 3: Cross multiply
   1,947.09x = 2,683.86 × 1,317.42
4. Step 4: Simplify right side
   1,947.09x = 3,535,770.84
5. Step 5: Solve for x
   x = 3,535,770.84/1,947.09
6. Step 6: Final answer
   x = 1,815.93