Finding the Fourth Proportional to 5,305.56, 7,321.72 and 2,947.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,305.56 : 7,321.72 = 2,947.69 : x
2. Step 2: Convert to fraction form
   5,305.56/7,321.72 = 2,947.69/x
3. Step 3: Cross multiply
   5,305.56x = 7,321.72 × 2,947.69
4. Step 4: Simplify right side
   5,305.56x = 21,582,160.83
5. Step 5: Solve for x
   x = 21,582,160.83/5,305.56
6. Step 6: Final answer
   x = 4,067.84