Finding the Fourth Proportional to 1,947.72, 2,683.32 and 1,357.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.72 : 2,683.32 = 1,357.22 : x
2. Step 2: Convert to fraction form
   1,947.72/2,683.32 = 1,357.22/x
3. Step 3: Cross multiply
   1,947.72x = 2,683.32 × 1,357.22
4. Step 4: Simplify right side
   1,947.72x = 3,641,855.57
5. Step 5: Solve for x
   x = 3,641,855.57/1,947.72
6. Step 6: Final answer
   x = 1,869.80