Finding the Fourth Proportional to 1,619.52, 2,233.44 and 1,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.52 : 2,233.44 = 1,398.72 : x
2. Step 2: Convert to fraction form
   1,619.52/2,233.44 = 1,398.72/x
3. Step 3: Cross multiply
   1,619.52x = 2,233.44 × 1,398.72
4. Step 4: Simplify right side
   1,619.52x = 3,123,957.20
5. Step 5: Solve for x
   x = 3,123,957.20/1,619.52
6. Step 6: Final answer
   x = 1,928.94