Finding the Fourth Proportional to 1,439.33, 1,985.30 and 1,162.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.33 : 1,985.30 = 1,162.54 : x
2. Step 2: Convert to fraction form
   1,439.33/1,985.30 = 1,162.54/x
3. Step 3: Cross multiply
   1,439.33x = 1,985.30 × 1,162.54
4. Step 4: Simplify right side
   1,439.33x = 2,307,979.89
5. Step 5: Solve for x
   x = 2,307,979.89/1,439.33
6. Step 6: Final answer
   x = 1,603.52