Finding the Fourth Proportional to 1,915.36, 2,642.71 and 1,169.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.36 : 2,642.71 = 1,169.27 : x
2. Step 2: Convert to fraction form
   1,915.36/2,642.71 = 1,169.27/x
3. Step 3: Cross multiply
   1,915.36x = 2,642.71 × 1,169.27
4. Step 4: Simplify right side
   1,915.36x = 3,090,041.52
5. Step 5: Solve for x
   x = 3,090,041.52/1,915.36
6. Step 6: Final answer
   x = 1,613.30