Finding the Fourth Proportional to 1,186.94, 1,768.54 and 1,057.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.94 : 1,768.54 = 1,057.61 : x
2. Step 2: Convert to fraction form
   1,186.94/1,768.54 = 1,057.61/x
3. Step 3: Cross multiply
   1,186.94x = 1,768.54 × 1,057.61
4. Step 4: Simplify right side
   1,186.94x = 1,870,425.59
5. Step 5: Solve for x
   x = 1,870,425.59/1,186.94
6. Step 6: Final answer
   x = 1,575.84