Finding the Fourth Proportional to 3,820.56, 5,277.42 and 2,947.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.56 : 5,277.42 = 2,947.32 : x
2. Step 2: Convert to fraction form
   3,820.56/5,277.42 = 2,947.32/x
3. Step 3: Cross multiply
   3,820.56x = 5,277.42 × 2,947.32
4. Step 4: Simplify right side
   3,820.56x = 15,554,245.51
5. Step 5: Solve for x
   x = 15,554,245.51/3,820.56
6. Step 6: Final answer
   x = 4,071.20