Finding the Fourth Proportional to 2,118.77, 2,924.67 and 1,279.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.77 : 2,924.67 = 1,279.47 : x
2. Step 2: Convert to fraction form
   2,118.77/2,924.67 = 1,279.47/x
3. Step 3: Cross multiply
   2,118.77x = 2,924.67 × 1,279.47
4. Step 4: Simplify right side
   2,118.77x = 3,742,027.52
5. Step 5: Solve for x
   x = 3,742,027.52/2,118.77
6. Step 6: Final answer
   x = 1,766.13