Finding the Fourth Proportional to 2,184.78, 3,015.23 and 1,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,184.78 : 3,015.23 = 1,345.31 : x
2. Step 2: Convert to fraction form
   2,184.78/3,015.23 = 1,345.31/x
3. Step 3: Cross multiply
   2,184.78x = 3,015.23 × 1,345.31
4. Step 4: Simplify right side
   2,184.78x = 4,056,419.07
5. Step 5: Solve for x
   x = 4,056,419.07/2,184.78
6. Step 6: Final answer
   x = 1,856.67