Finding the Fourth Proportional to 2,048.80, 3,073.89 and 815.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.80 : 3,073.89 = 815.88 : x
2. Step 2: Convert to fraction form
   2,048.80/3,073.89 = 815.88/x
3. Step 3: Cross multiply
   2,048.80x = 3,073.89 × 815.88
4. Step 4: Simplify right side
   2,048.80x = 2,507,925.37
5. Step 5: Solve for x
   x = 2,507,925.37/2,048.80
6. Step 6: Final answer
   x = 1,224.09