Finding the Fourth Proportional to 13,348.49, 18,420.72 and 7,380.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,348.49 : 18,420.72 = 7,380.04 : x
2. Step 2: Convert to fraction form
   13,348.49/18,420.72 = 7,380.04/x
3. Step 3: Cross multiply
   13,348.49x = 18,420.72 × 7,380.04
4. Step 4: Simplify right side
   13,348.49x = 135,945,650.43
5. Step 5: Solve for x
   x = 135,945,650.43/13,348.49
6. Step 6: Final answer
   x = 10,184.35