Finding the Fourth Proportional to 3,047.56, 4,205.82 and 1,720.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,047.56 : 4,205.82 = 1,720.78 : x
2. Step 2: Convert to fraction form
   3,047.56/4,205.82 = 1,720.78/x
3. Step 3: Cross multiply
   3,047.56x = 4,205.82 × 1,720.78
4. Step 4: Simplify right side
   3,047.56x = 7,237,286.88
5. Step 5: Solve for x
   x = 7,237,286.88/3,047.56
6. Step 6: Final answer
   x = 2,374.78