Finding the Fourth Proportional to 8,128.50, 12,193.83 and 3,512.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.50 : 12,193.83 = 3,512.58 : x
2. Step 2: Convert to fraction form
   8,128.50/12,193.83 = 3,512.58/x
3. Step 3: Cross multiply
   8,128.50x = 12,193.83 × 3,512.58
4. Step 4: Simplify right side
   8,128.50x = 42,831,803.38
5. Step 5: Solve for x
   x = 42,831,803.38/8,128.50
6. Step 6: Final answer
   x = 5,269.34