Finding the Fourth Proportional to 8,521.48, 12,777.86 and 3,900.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,521.48 : 12,777.86 = 3,900.52 : x
2. Step 2: Convert to fraction form
   8,521.48/12,777.86 = 3,900.52/x
3. Step 3: Cross multiply
   8,521.48x = 12,777.86 × 3,900.52
4. Step 4: Simplify right side
   8,521.48x = 49,840,298.49
5. Step 5: Solve for x
   x = 49,840,298.49/8,521.48
6. Step 6: Final answer
   x = 5,848.78