Finding the Fourth Proportional to 2,091.28, 2,885.90 and 1,147.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.28 : 2,885.90 = 1,147.02 : x
2. Step 2: Convert to fraction form
   2,091.28/2,885.90 = 1,147.02/x
3. Step 3: Cross multiply
   2,091.28x = 2,885.90 × 1,147.02
4. Step 4: Simplify right side
   2,091.28x = 3,310,185.02
5. Step 5: Solve for x
   x = 3,310,185.02/2,091.28
6. Step 6: Final answer
   x = 1,582.85