Finding the Fourth Proportional to 13,398.14, 18,488.52 and 7,429.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,398.14 : 18,488.52 = 7,429.59 : x
2. Step 2: Convert to fraction form
   13,398.14/18,488.52 = 7,429.59/x
3. Step 3: Cross multiply
   13,398.14x = 18,488.52 × 7,429.59
4. Step 4: Simplify right side
   13,398.14x = 137,362,123.31
5. Step 5: Solve for x
   x = 137,362,123.31/13,398.14
6. Step 6: Final answer
   x = 10,252.33