Finding the Fourth Proportional to 1,897.48, 2,619.30 and 1,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.48 : 2,619.30 = 1,198.72 : x
2. Step 2: Convert to fraction form
   1,897.48/2,619.30 = 1,198.72/x
3. Step 3: Cross multiply
   1,897.48x = 2,619.30 × 1,198.72
4. Step 4: Simplify right side
   1,897.48x = 3,139,807.30
5. Step 5: Solve for x
   x = 3,139,807.30/1,897.48
6. Step 6: Final answer
   x = 1,654.72