Finding the Fourth Proportional to 2,279.94, 3,418.54 and 891.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.94 : 3,418.54 = 891.62 : x
2. Step 2: Convert to fraction form
   2,279.94/3,418.54 = 891.62/x
3. Step 3: Cross multiply
   2,279.94x = 3,418.54 × 891.62
4. Step 4: Simplify right side
   2,279.94x = 3,048,038.63
5. Step 5: Solve for x
   x = 3,048,038.63/2,279.94
6. Step 6: Final answer
   x = 1,336.89