Finding the Fourth Proportional to 2,180.69, 3,009.34 and 1,236.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.69 : 3,009.34 = 1,236.67 : x
2. Step 2: Convert to fraction form
   2,180.69/3,009.34 = 1,236.67/x
3. Step 3: Cross multiply
   2,180.69x = 3,009.34 × 1,236.67
4. Step 4: Simplify right side
   2,180.69x = 3,721,539.27
5. Step 5: Solve for x
   x = 3,721,539.27/2,180.69
6. Step 6: Final answer
   x = 1,706.59