Finding the Fourth Proportional to 1,615.46, 2,230.41 and 1,091.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.46 : 2,230.41 = 1,091.30 : x
2. Step 2: Convert to fraction form
   1,615.46/2,230.41 = 1,091.30/x
3. Step 3: Cross multiply
   1,615.46x = 2,230.41 × 1,091.30
4. Step 4: Simplify right side
   1,615.46x = 2,434,046.43
5. Step 5: Solve for x
   x = 2,434,046.43/1,615.46
6. Step 6: Final answer
   x = 1,506.72