Finding the Fourth Proportional to 3,279.17, 4,917.69 and 1,087.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,279.17 : 4,917.69 = 1,087.31 : x
2. Step 2: Convert to fraction form
   3,279.17/4,917.69 = 1,087.31/x
3. Step 3: Cross multiply
   3,279.17x = 4,917.69 × 1,087.31
4. Step 4: Simplify right side
   3,279.17x = 5,347,069.89
5. Step 5: Solve for x
   x = 5,347,069.89/3,279.17
6. Step 6: Final answer
   x = 1,630.62