Finding the Fourth Proportional to 2,784.56, 4,174.35 and 1,054.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.56 : 4,174.35 = 1,054.40 : x
2. Step 2: Convert to fraction form
   2,784.56/4,174.35 = 1,054.40/x
3. Step 3: Cross multiply
   2,784.56x = 4,174.35 × 1,054.40
4. Step 4: Simplify right side
   2,784.56x = 4,401,434.64
5. Step 5: Solve for x
   x = 4,401,434.64/2,784.56
6. Step 6: Final answer
   x = 1,580.66