Finding the Fourth Proportional to 13,401.05, 18,490.68 and 7,735.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.05 : 18,490.68 = 7,735.70 : x
2. Step 2: Convert to fraction form
   13,401.05/18,490.68 = 7,735.70/x
3. Step 3: Cross multiply
   13,401.05x = 18,490.68 × 7,735.70
4. Step 4: Simplify right side
   13,401.05x = 143,038,399.50
5. Step 5: Solve for x
   x = 143,038,399.50/13,401.05
6. Step 6: Final answer
   x = 10,673.68