Finding the Fourth Proportional to 1,816.83, 2,509.52 and 1,580.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.83 : 2,509.52 = 1,580.31 : x
2. Step 2: Convert to fraction form
   1,816.83/2,509.52 = 1,580.31/x
3. Step 3: Cross multiply
   1,816.83x = 2,509.52 × 1,580.31
4. Step 4: Simplify right side
   1,816.83x = 3,965,811.65
5. Step 5: Solve for x
   x = 3,965,811.65/1,816.83
6. Step 6: Final answer
   x = 2,182.82