Finding the Fourth Proportional to 1,338.72, 1,848.51 and 1,198.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.72 : 1,848.51 = 1,198.59 : x
2. Step 2: Convert to fraction form
   1,338.72/1,848.51 = 1,198.59/x
3. Step 3: Cross multiply
   1,338.72x = 1,848.51 × 1,198.59
4. Step 4: Simplify right side
   1,338.72x = 2,215,605.60
5. Step 5: Solve for x
   x = 2,215,605.60/1,338.72
6. Step 6: Final answer
   x = 1,655.02