Finding the Fourth Proportional to 1,395.32, 1,921.30 and 1,208.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.32 : 1,921.30 = 1,208.82 : x
2. Step 2: Convert to fraction form
   1,395.32/1,921.30 = 1,208.82/x
3. Step 3: Cross multiply
   1,395.32x = 1,921.30 × 1,208.82
4. Step 4: Simplify right side
   1,395.32x = 2,322,505.87
5. Step 5: Solve for x
   x = 2,322,505.87/1,395.32
6. Step 6: Final answer
   x = 1,664.50