Finding the Fourth Proportional to 1,393.95, 1,924.22 and 897.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.95 : 1,924.22 = 897.21 : x
2. Step 2: Convert to fraction form
   1,393.95/1,924.22 = 897.21/x
3. Step 3: Cross multiply
   1,393.95x = 1,924.22 × 897.21
4. Step 4: Simplify right side
   1,393.95x = 1,726,429.43
5. Step 5: Solve for x
   x = 1,726,429.43/1,393.95
6. Step 6: Final answer
   x = 1,238.52