Finding the Fourth Proportional to 2,921.38, 4,378.23 and 1,189.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,921.38 : 4,378.23 = 1,189.06 : x
2. Step 2: Convert to fraction form
   2,921.38/4,378.23 = 1,189.06/x
3. Step 3: Cross multiply
   2,921.38x = 4,378.23 × 1,189.06
4. Step 4: Simplify right side
   2,921.38x = 5,205,978.16
5. Step 5: Solve for x
   x = 5,205,978.16/2,921.38
6. Step 6: Final answer
   x = 1,782.03