Finding the Fourth Proportional to 13,397.97, 18,488.58 and 7,429.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,397.97 : 18,488.58 = 7,429.56 : x
2. Step 2: Convert to fraction form
   13,397.97/18,488.58 = 7,429.56/x
3. Step 3: Cross multiply
   13,397.97x = 18,488.58 × 7,429.56
4. Step 4: Simplify right side
   13,397.97x = 137,362,014.42
5. Step 5: Solve for x
   x = 137,362,014.42/13,397.97
6. Step 6: Final answer
   x = 10,252.45