Finding the Fourth Proportional to 3,519.86, 5,279.31 and 922.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,519.86 : 5,279.31 = 922.58 : x
2. Step 2: Convert to fraction form
   3,519.86/5,279.31 = 922.58/x
3. Step 3: Cross multiply
   3,519.86x = 5,279.31 × 922.58
4. Step 4: Simplify right side
   3,519.86x = 4,870,585.82
5. Step 5: Solve for x
   x = 4,870,585.82/3,519.86
6. Step 6: Final answer
   x = 1,383.74