Finding the Fourth Proportional to 1,909.46, 2,635.25 and 1,163.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.46 : 2,635.25 = 1,163.61 : x
2. Step 2: Convert to fraction form
   1,909.46/2,635.25 = 1,163.61/x
3. Step 3: Cross multiply
   1,909.46x = 2,635.25 × 1,163.61
4. Step 4: Simplify right side
   1,909.46x = 3,066,397.43
5. Step 5: Solve for x
   x = 3,066,397.43/1,909.46
6. Step 6: Final answer
   x = 1,605.90