Finding the Fourth Proportional to 1,182.81, 1,764.55 and 1,098.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.81 : 1,764.55 = 1,098.91 : x
2. Step 2: Convert to fraction form
   1,182.81/1,764.55 = 1,098.91/x
3. Step 3: Cross multiply
   1,182.81x = 1,764.55 × 1,098.91
4. Step 4: Simplify right side
   1,182.81x = 1,939,076.15
5. Step 5: Solve for x
   x = 1,939,076.15/1,182.81
6. Step 6: Final answer
   x = 1,639.38