Finding the Fourth Proportional to 13,417.80, 18,516.89 and 7,449.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,417.80 : 18,516.89 = 7,449.79 : x
2. Step 2: Convert to fraction form
   13,417.80/18,516.89 = 7,449.79/x
3. Step 3: Cross multiply
   13,417.80x = 18,516.89 × 7,449.79
4. Step 4: Simplify right side
   13,417.80x = 137,946,907.10
5. Step 5: Solve for x
   x = 137,946,907.10/13,417.80
6. Step 6: Final answer
   x = 10,280.89