Finding the Fourth Proportional to 1,764.18, 2,435.37 and 1,205.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.18 : 2,435.37 = 1,205.55 : x
2. Step 2: Convert to fraction form
   1,764.18/2,435.37 = 1,205.55/x
3. Step 3: Cross multiply
   1,764.18x = 2,435.37 × 1,205.55
4. Step 4: Simplify right side
   1,764.18x = 2,935,960.30
5. Step 5: Solve for x
   x = 2,935,960.30/1,764.18
6. Step 6: Final answer
   x = 1,664.21