Finding the Fourth Proportional to 2,130.55, 2,940.53 and 1,279.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.55 : 2,940.53 = 1,279.55 : x
2. Step 2: Convert to fraction form
   2,130.55/2,940.53 = 1,279.55/x
3. Step 3: Cross multiply
   2,130.55x = 2,940.53 × 1,279.55
4. Step 4: Simplify right side
   2,130.55x = 3,762,556.12
5. Step 5: Solve for x
   x = 3,762,556.12/2,130.55
6. Step 6: Final answer
   x = 1,766.00