Finding the Fourth Proportional to 2,615.34, 3,923.91 and 1,055.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.34 : 3,923.91 = 1,055.69 : x
2. Step 2: Convert to fraction form
   2,615.34/3,923.91 = 1,055.69/x
3. Step 3: Cross multiply
   2,615.34x = 3,923.91 × 1,055.69
4. Step 4: Simplify right side
   2,615.34x = 4,142,412.93
5. Step 5: Solve for x
   x = 4,142,412.93/2,615.34
6. Step 6: Final answer
   x = 1,583.89