Finding the Fourth Proportional to 8,521.46, 12,777.86 and 3,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,521.46 : 12,777.86 = 3,900.50 : x
2. Step 2: Convert to fraction form
   8,521.46/12,777.86 = 3,900.50/x
3. Step 3: Cross multiply
   8,521.46x = 12,777.86 × 3,900.50
4. Step 4: Simplify right side
   8,521.46x = 49,840,042.93
5. Step 5: Solve for x
   x = 49,840,042.93/8,521.46
6. Step 6: Final answer
   x = 5,848.77