Finding the Fourth Proportional to 2,253.78, 3,109.46 and 1,309.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.78 : 3,109.46 = 1,309.32 : x
2. Step 2: Convert to fraction form
   2,253.78/3,109.46 = 1,309.32/x
3. Step 3: Cross multiply
   2,253.78x = 3,109.46 × 1,309.32
4. Step 4: Simplify right side
   2,253.78x = 4,071,271.62
5. Step 5: Solve for x
   x = 4,071,271.62/2,253.78
6. Step 6: Final answer
   x = 1,806.42