Finding the Fourth Proportional to 1,155.98, 1,735.59 and 669.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.98 : 1,735.59 = 669.57 : x
2. Step 2: Convert to fraction form
   1,155.98/1,735.59 = 669.57/x
3. Step 3: Cross multiply
   1,155.98x = 1,735.59 × 669.57
4. Step 4: Simplify right side
   1,155.98x = 1,162,099.00
5. Step 5: Solve for x
   x = 1,162,099.00/1,155.98
6. Step 6: Final answer
   x = 1,005.30