Finding the Fourth Proportional to 2,186.34, 2,996.81 and 2,155.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.34 : 2,996.81 = 2,155.59 : x
2. Step 2: Convert to fraction form
   2,186.34/2,996.81 = 2,155.59/x
3. Step 3: Cross multiply
   2,186.34x = 2,996.81 × 2,155.59
4. Step 4: Simplify right side
   2,186.34x = 6,459,882.89
5. Step 5: Solve for x
   x = 6,459,882.89/2,186.34
6. Step 6: Final answer
   x = 2,954.66