Finding the Fourth Proportional to 1,945.42, 2,684.74 and 1,189.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.42 : 2,684.74 = 1,189.33 : x
2. Step 2: Convert to fraction form
   1,945.42/2,684.74 = 1,189.33/x
3. Step 3: Cross multiply
   1,945.42x = 2,684.74 × 1,189.33
4. Step 4: Simplify right side
   1,945.42x = 3,193,041.82
5. Step 5: Solve for x
   x = 3,193,041.82/1,945.42
6. Step 6: Final answer
   x = 1,641.31