Finding the Fourth Proportional to 1,581.33, 2,374.05 and 1,216.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.33 : 2,374.05 = 1,216.38 : x
2. Step 2: Convert to fraction form
   1,581.33/2,374.05 = 1,216.38/x
3. Step 3: Cross multiply
   1,581.33x = 2,374.05 × 1,216.38
4. Step 4: Simplify right side
   1,581.33x = 2,887,746.94
5. Step 5: Solve for x
   x = 2,887,746.94/1,581.33
6. Step 6: Final answer
   x = 1,826.15