Finding the Fourth Proportional to 1,897.56, 2,617.80 and 1,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.56 : 2,617.80 = 1,198.50 : x
2. Step 2: Convert to fraction form
   1,897.56/2,617.80 = 1,198.50/x
3. Step 3: Cross multiply
   1,897.56x = 2,617.80 × 1,198.50
4. Step 4: Simplify right side
   1,897.56x = 3,137,433.30
5. Step 5: Solve for x
   x = 3,137,433.30/1,897.56
6. Step 6: Final answer
   x = 1,653.40