Finding the Fourth Proportional to 8,111.30, 12,160.58 and 3,427.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.30 : 12,160.58 = 3,427.48 : x
2. Step 2: Convert to fraction form
   8,111.30/12,160.58 = 3,427.48/x
3. Step 3: Cross multiply
   8,111.30x = 12,160.58 × 3,427.48
4. Step 4: Simplify right side
   8,111.30x = 41,680,144.74
5. Step 5: Solve for x
   x = 41,680,144.74/8,111.30
6. Step 6: Final answer
   x = 5,138.53