Finding the Fourth Proportional to 2,443.55, 3,665.17 and 1,055.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.55 : 3,665.17 = 1,055.91 : x
2. Step 2: Convert to fraction form
   2,443.55/3,665.17 = 1,055.91/x
3. Step 3: Cross multiply
   2,443.55x = 3,665.17 × 1,055.91
4. Step 4: Simplify right side
   2,443.55x = 3,870,084.38
5. Step 5: Solve for x
   x = 3,870,084.38/2,443.55
6. Step 6: Final answer
   x = 1,583.80