Finding the Fourth Proportional to 2,760.32, 4,136.45 and 1,279.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.32 : 4,136.45 = 1,279.99 : x
2. Step 2: Convert to fraction form
   2,760.32/4,136.45 = 1,279.99/x
3. Step 3: Cross multiply
   2,760.32x = 4,136.45 × 1,279.99
4. Step 4: Simplify right side
   2,760.32x = 5,294,597.89
5. Step 5: Solve for x
   x = 5,294,597.89/2,760.32
6. Step 6: Final answer
   x = 1,918.11