Finding the Fourth Proportional to 8,633.72, 12,953.31 and 3,086.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,633.72 : 12,953.31 = 3,086.94 : x
2. Step 2: Convert to fraction form
   8,633.72/12,953.31 = 3,086.94/x
3. Step 3: Cross multiply
   8,633.72x = 12,953.31 × 3,086.94
4. Step 4: Simplify right side
   8,633.72x = 39,986,090.77
5. Step 5: Solve for x
   x = 39,986,090.77/8,633.72
6. Step 6: Final answer
   x = 4,631.39