Finding the Fourth Proportional to 2,118.91, 2,924.13 and 1,279.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.91 : 2,924.13 = 1,279.47 : x
2. Step 2: Convert to fraction form
   2,118.91/2,924.13 = 1,279.47/x
3. Step 3: Cross multiply
   2,118.91x = 2,924.13 × 1,279.47
4. Step 4: Simplify right side
   2,118.91x = 3,741,333.35
5. Step 5: Solve for x
   x = 3,741,333.35/2,118.91
6. Step 6: Final answer
   x = 1,765.69