Finding the Fourth Proportional to 8,522.72, 12,779.74 and 3,901.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,522.72 : 12,779.74 = 3,901.76 : x
2. Step 2: Convert to fraction form
   8,522.72/12,779.74 = 3,901.76/x
3. Step 3: Cross multiply
   8,522.72x = 12,779.74 × 3,901.76
4. Step 4: Simplify right side
   8,522.72x = 49,863,478.34
5. Step 5: Solve for x
   x = 49,863,478.34/8,522.72
6. Step 6: Final answer
   x = 5,850.65