Finding the Fourth Proportional to 1,308.98, 1,964.50 and 1,155.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.98 : 1,964.50 = 1,155.22 : x
2. Step 2: Convert to fraction form
   1,308.98/1,964.50 = 1,155.22/x
3. Step 3: Cross multiply
   1,308.98x = 1,964.50 × 1,155.22
4. Step 4: Simplify right side
   1,308.98x = 2,269,429.69
5. Step 5: Solve for x
   x = 2,269,429.69/1,308.98
6. Step 6: Final answer
   x = 1,733.74