Finding the Fourth Proportional to 1,851.76, 2,555.34 and 1,012.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.76 : 2,555.34 = 1,012.42 : x
2. Step 2: Convert to fraction form
   1,851.76/2,555.34 = 1,012.42/x
3. Step 3: Cross multiply
   1,851.76x = 2,555.34 × 1,012.42
4. Step 4: Simplify right side
   1,851.76x = 2,587,077.32
5. Step 5: Solve for x
   x = 2,587,077.32/1,851.76
6. Step 6: Final answer
   x = 1,397.09