Finding the Fourth Proportional to 8,445.50, 12,665.61 and 3,181.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,445.50 : 12,665.61 = 3,181.25 : x
2. Step 2: Convert to fraction form
   8,445.50/12,665.61 = 3,181.25/x
3. Step 3: Cross multiply
   8,445.50x = 12,665.61 × 3,181.25
4. Step 4: Simplify right side
   8,445.50x = 40,292,408.48
5. Step 5: Solve for x
   x = 40,292,408.48/8,445.50
6. Step 6: Final answer
   x = 4,770.88