Finding the Fourth Proportional to 13,401.99, 18,495.58 and 7,737.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.99 : 18,495.58 = 7,737.77 : x
2. Step 2: Convert to fraction form
   13,401.99/18,495.58 = 7,737.77/x
3. Step 3: Cross multiply
   13,401.99x = 18,495.58 × 7,737.77
4. Step 4: Simplify right side
   13,401.99x = 143,114,550.78
5. Step 5: Solve for x
   x = 143,114,550.78/13,401.99
6. Step 6: Final answer
   x = 10,678.61