Finding the Fourth Proportional to 12,531.89, 18,800.75 and 3,647.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,531.89 : 18,800.75 = 3,647.43 : x
2. Step 2: Convert to fraction form
   12,531.89/18,800.75 = 3,647.43/x
3. Step 3: Cross multiply
   12,531.89x = 18,800.75 × 3,647.43
4. Step 4: Simplify right side
   12,531.89x = 68,574,401.34
5. Step 5: Solve for x
   x = 68,574,401.34/12,531.89
6. Step 6: Final answer
   x = 5,471.99