Finding the Fourth Proportional to 1,341.30, 2,012.52 and 855.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.30 : 2,012.52 = 855.30 : x
2. Step 2: Convert to fraction form
   1,341.30/2,012.52 = 855.30/x
3. Step 3: Cross multiply
   1,341.30x = 2,012.52 × 855.30
4. Step 4: Simplify right side
   1,341.30x = 1,721,308.36
5. Step 5: Solve for x
   x = 1,721,308.36/1,341.30
6. Step 6: Final answer
   x = 1,283.31