Finding the Fourth Proportional to 2,158.33, 2,978.42 and 1,214.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.33 : 2,978.42 = 1,214.14 : x
2. Step 2: Convert to fraction form
   2,158.33/2,978.42 = 1,214.14/x
3. Step 3: Cross multiply
   2,158.33x = 2,978.42 × 1,214.14
4. Step 4: Simplify right side
   2,158.33x = 3,616,221.89
5. Step 5: Solve for x
   x = 3,616,221.89/2,158.33
6. Step 6: Final answer
   x = 1,675.47