Finding the Fourth Proportional to 1,936.27, 2,670.48 and 1,188.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,936.27 : 2,670.48 = 1,188.89 : x
2. Step 2: Convert to fraction form
   1,936.27/2,670.48 = 1,188.89/x
3. Step 3: Cross multiply
   1,936.27x = 2,670.48 × 1,188.89
4. Step 4: Simplify right side
   1,936.27x = 3,174,901.02
5. Step 5: Solve for x
   x = 3,174,901.02/1,936.27
6. Step 6: Final answer
   x = 1,639.70