Finding the Fourth Proportional to 5,426.63, 8,131.58 and 3,664.73

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426.63 : 8,131.58 = 3,664.73 : x
2. Step 2: Convert to fraction form
   5,426.63/8,131.58 = 3,664.73/x
3. Step 3: Cross multiply
   5,426.63x = 8,131.58 × 3,664.73
4. Step 4: Simplify right side
   5,426.63x = 29,800,045.17
5. Step 5: Solve for x
   x = 29,800,045.17/5,426.63
6. Step 6: Final answer
   x = 5,491.45