Finding the Fourth Proportional to 1,683.89, 2,325.85 and 1,188.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,683.89 : 2,325.85 = 1,188.74 : x
2. Step 2: Convert to fraction form
   1,683.89/2,325.85 = 1,188.74/x
3. Step 3: Cross multiply
   1,683.89x = 2,325.85 × 1,188.74
4. Step 4: Simplify right side
   1,683.89x = 2,764,839.72
5. Step 5: Solve for x
   x = 2,764,839.72/1,683.89
6. Step 6: Final answer
   x = 1,641.93