Finding the Fourth Proportional to 1,915.50, 2,643.18 and 1,169.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.50 : 2,643.18 = 1,169.10 : x
2. Step 2: Convert to fraction form
   1,915.50/2,643.18 = 1,169.10/x
3. Step 3: Cross multiply
   1,915.50x = 2,643.18 × 1,169.10
4. Step 4: Simplify right side
   1,915.50x = 3,090,141.74
5. Step 5: Solve for x
   x = 3,090,141.74/1,915.50
6. Step 6: Final answer
   x = 1,613.23