Finding the Fourth Proportional to 3,354.28, 5,031.34 and 1,045.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,354.28 : 5,031.34 = 1,045.72 : x
2. Step 2: Convert to fraction form
   3,354.28/5,031.34 = 1,045.72/x
3. Step 3: Cross multiply
   3,354.28x = 5,031.34 × 1,045.72
4. Step 4: Simplify right side
   3,354.28x = 5,261,372.86
5. Step 5: Solve for x
   x = 5,261,372.86/3,354.28
6. Step 6: Final answer
   x = 1,568.56