Finding the Fourth Proportional to 8,292.72, 12,436.56 and 3,905.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,292.72 : 12,436.56 = 3,905.76 : x
2. Step 2: Convert to fraction form
   8,292.72/12,436.56 = 3,905.76/x
3. Step 3: Cross multiply
   8,292.72x = 12,436.56 × 3,905.76
4. Step 4: Simplify right side
   8,292.72x = 48,574,218.59
5. Step 5: Solve for x
   x = 48,574,218.59/8,292.72
6. Step 6: Final answer
   x = 5,857.45