Finding the Fourth Proportional to 2,091.56, 2,885.46 and 1,393.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.56 : 2,885.46 = 1,393.16 : x
2. Step 2: Convert to fraction form
   2,091.56/2,885.46 = 1,393.16/x
3. Step 3: Cross multiply
   2,091.56x = 2,885.46 × 1,393.16
4. Step 4: Simplify right side
   2,091.56x = 4,019,907.45
5. Step 5: Solve for x
   x = 4,019,907.45/2,091.56
6. Step 6: Final answer
   x = 1,921.97