Finding the Fourth Proportional to 1,815.34, 2,721.57 and 775.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.34 : 2,721.57 = 775.48 : x
2. Step 2: Convert to fraction form
   1,815.34/2,721.57 = 775.48/x
3. Step 3: Cross multiply
   1,815.34x = 2,721.57 × 775.48
4. Step 4: Simplify right side
   1,815.34x = 2,110,523.10
5. Step 5: Solve for x
   x = 2,110,523.10/1,815.34
6. Step 6: Final answer
   x = 1,162.60