Finding the Fourth Proportional to 2,048.31, 3,074.18 and 816.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.31 : 3,074.18 = 816.57 : x
2. Step 2: Convert to fraction form
   2,048.31/3,074.18 = 816.57/x
3. Step 3: Cross multiply
   2,048.31x = 3,074.18 × 816.57
4. Step 4: Simplify right side
   2,048.31x = 2,510,279.08
5. Step 5: Solve for x
   x = 2,510,279.08/2,048.31
6. Step 6: Final answer
   x = 1,225.54