Finding the Fourth Proportional to 2,092.81, 3,138.23 and 1,215.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.81 : 3,138.23 = 1,215.59 : x
2. Step 2: Convert to fraction form
   2,092.81/3,138.23 = 1,215.59/x
3. Step 3: Cross multiply
   2,092.81x = 3,138.23 × 1,215.59
4. Step 4: Simplify right side
   2,092.81x = 3,814,801.01
5. Step 5: Solve for x
   x = 3,814,801.01/2,092.81
6. Step 6: Final answer
   x = 1,822.81