Finding the Fourth Proportional to 1,806.24, 2,490.32 and 1,215.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.24 : 2,490.32 = 1,215.52 : x
2. Step 2: Convert to fraction form
   1,806.24/2,490.32 = 1,215.52/x
3. Step 3: Cross multiply
   1,806.24x = 2,490.32 × 1,215.52
4. Step 4: Simplify right side
   1,806.24x = 3,027,033.77
5. Step 5: Solve for x
   x = 3,027,033.77/1,806.24
6. Step 6: Final answer
   x = 1,675.88