Finding the Fourth Proportional to 7,977.39, 11,947.86 and 3,820.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,977.39 : 11,947.86 = 3,820.32 : x
2. Step 2: Convert to fraction form
   7,977.39/11,947.86 = 3,820.32/x
3. Step 3: Cross multiply
   7,977.39x = 11,947.86 × 3,820.32
4. Step 4: Simplify right side
   7,977.39x = 45,644,648.52
5. Step 5: Solve for x
   x = 45,644,648.52/7,977.39
6. Step 6: Final answer
   x = 5,721.75