Finding the Fourth Proportional to 13,406.98, 18,501.49 and 7,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,406.98 : 18,501.49 = 7,438.50 : x
2. Step 2: Convert to fraction form
   13,406.98/18,501.49 = 7,438.50/x
3. Step 3: Cross multiply
   13,406.98x = 18,501.49 × 7,438.50
4. Step 4: Simplify right side
   13,406.98x = 137,623,333.37
5. Step 5: Solve for x
   x = 137,623,333.37/13,406.98
6. Step 6: Final answer
   x = 10,265.05