Finding the Fourth Proportional to 13,370.49, 18,450.50 and 7,401.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,370.49 : 18,450.50 = 7,401.78 : x
2. Step 2: Convert to fraction form
   13,370.49/18,450.50 = 7,401.78/x
3. Step 3: Cross multiply
   13,370.49x = 18,450.50 × 7,401.78
4. Step 4: Simplify right side
   13,370.49x = 136,566,504.88
5. Step 5: Solve for x
   x = 136,566,504.88/13,370.49
6. Step 6: Final answer
   x = 10,214.02