Finding the Fourth Proportional to 31,983.05, 47,977.52 and 8,290.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,983.05 : 47,977.52 = 8,290.55 : x
2. Step 2: Convert to fraction form
   31,983.05/47,977.52 = 8,290.55/x
3. Step 3: Cross multiply
   31,983.05x = 47,977.52 × 8,290.55
4. Step 4: Simplify right side
   31,983.05x = 397,760,106.93
5. Step 5: Solve for x
   x = 397,760,106.93/31,983.05
6. Step 6: Final answer
   x = 12,436.59