Finding the Fourth Proportional to 2,180.81, 3,009.45 and 1,236.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.81 : 3,009.45 = 1,236.69 : x
2. Step 2: Convert to fraction form
   2,180.81/3,009.45 = 1,236.69/x
3. Step 3: Cross multiply
   2,180.81x = 3,009.45 × 1,236.69
4. Step 4: Simplify right side
   2,180.81x = 3,721,741.67
5. Step 5: Solve for x
   x = 3,721,741.67/2,180.81
6. Step 6: Final answer
   x = 1,706.59