Finding the Fourth Proportional to 3,279.09, 4,915.53 and 1,086.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,279.09 : 4,915.53 = 1,086.61 : x
2. Step 2: Convert to fraction form
   3,279.09/4,915.53 = 1,086.61/x
3. Step 3: Cross multiply
   3,279.09x = 4,915.53 × 1,086.61
4. Step 4: Simplify right side
   3,279.09x = 5,341,264.05
5. Step 5: Solve for x
   x = 5,341,264.05/3,279.09
6. Step 6: Final answer
   x = 1,628.89