Finding the Fourth Proportional to 2,485.58, 3,729.56 and 1,098.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.58 : 3,729.56 = 1,098.72 : x
2. Step 2: Convert to fraction form
   2,485.58/3,729.56 = 1,098.72/x
3. Step 3: Cross multiply
   2,485.58x = 3,729.56 × 1,098.72
4. Step 4: Simplify right side
   2,485.58x = 4,097,736.67
5. Step 5: Solve for x
   x = 4,097,736.67/2,485.58
6. Step 6: Final answer
   x = 1,648.61