Finding the Fourth Proportional to 8,300.58, 12,447.57 and 4,139.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.58 : 12,447.57 = 4,139.10 : x
2. Step 2: Convert to fraction form
   8,300.58/12,447.57 = 4,139.10/x
3. Step 3: Cross multiply
   8,300.58x = 12,447.57 × 4,139.10
4. Step 4: Simplify right side
   8,300.58x = 51,521,736.99
5. Step 5: Solve for x
   x = 51,521,736.99/8,300.58
6. Step 6: Final answer
   x = 6,207.00