Finding the Fourth Proportional to 6,078.53, 8,390.44 and 3,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,078.53 : 8,390.44 = 3,780.72 : x
2. Step 2: Convert to fraction form
   6,078.53/8,390.44 = 3,780.72/x
3. Step 3: Cross multiply
   6,078.53x = 8,390.44 × 3,780.72
4. Step 4: Simplify right side
   6,078.53x = 31,721,904.32
5. Step 5: Solve for x
   x = 31,721,904.32/6,078.53
6. Step 6: Final answer
   x = 5,218.68