Finding the Fourth Proportional to 1,638.15, 2,459.58 and 1,558.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.15 : 2,459.58 = 1,558.83 : x
2. Step 2: Convert to fraction form
   1,638.15/2,459.58 = 1,558.83/x
3. Step 3: Cross multiply
   1,638.15x = 2,459.58 × 1,558.83
4. Step 4: Simplify right side
   1,638.15x = 3,834,067.09
5. Step 5: Solve for x
   x = 3,834,067.09/1,638.15
6. Step 6: Final answer
   x = 2,340.49