Finding the Fourth Proportional to 1,427.89, 2,138.55 and 732.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.89 : 2,138.55 = 732.85 : x
2. Step 2: Convert to fraction form
   1,427.89/2,138.55 = 732.85/x
3. Step 3: Cross multiply
   1,427.89x = 2,138.55 × 732.85
4. Step 4: Simplify right side
   1,427.89x = 1,567,236.37
5. Step 5: Solve for x
   x = 1,567,236.37/1,427.89
6. Step 6: Final answer
   x = 1,097.59