Finding the Fourth Proportional to 1,665.12, 2,294.64 and 1,198.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.12 : 2,294.64 = 1,198.56 : x
2. Step 2: Convert to fraction form
   1,665.12/2,294.64 = 1,198.56/x
3. Step 3: Cross multiply
   1,665.12x = 2,294.64 × 1,198.56
4. Step 4: Simplify right side
   1,665.12x = 2,750,263.72
5. Step 5: Solve for x
   x = 2,750,263.72/1,665.12
6. Step 6: Final answer
   x = 1,651.69