Finding the Fourth Proportional to 2,787.12, 4,181.76 and 1,055.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.12 : 4,181.76 = 1,055.34 : x
2. Step 2: Convert to fraction form
   2,787.12/4,181.76 = 1,055.34/x
3. Step 3: Cross multiply
   2,787.12x = 4,181.76 × 1,055.34
4. Step 4: Simplify right side
   2,787.12x = 4,413,178.60
5. Step 5: Solve for x
   x = 4,413,178.60/2,787.12
6. Step 6: Final answer
   x = 1,583.42