Finding the Fourth Proportional to 2,171.14, 2,997.12 and 1,386.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.14 : 2,997.12 = 1,386.22 : x
2. Step 2: Convert to fraction form
   2,171.14/2,997.12 = 1,386.22/x
3. Step 3: Cross multiply
   2,171.14x = 2,997.12 × 1,386.22
4. Step 4: Simplify right side
   2,171.14x = 4,154,667.69
5. Step 5: Solve for x
   x = 4,154,667.69/2,171.14
6. Step 6: Final answer
   x = 1,913.59