Finding the Fourth Proportional to 12,200.55, 18,302.31 and 3,878.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.55 : 18,302.31 = 3,878.34 : x
2. Step 2: Convert to fraction form
   12,200.55/18,302.31 = 3,878.34/x
3. Step 3: Cross multiply
   12,200.55x = 18,302.31 × 3,878.34
4. Step 4: Simplify right side
   12,200.55x = 70,982,580.97
5. Step 5: Solve for x
   x = 70,982,580.97/12,200.55
6. Step 6: Final answer
   x = 5,817.98