Finding the Fourth Proportional to 13,355.06, 18,429.90 and 7,386.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,355.06 : 18,429.90 = 7,386.62 : x
2. Step 2: Convert to fraction form
   13,355.06/18,429.90 = 7,386.62/x
3. Step 3: Cross multiply
   13,355.06x = 18,429.90 × 7,386.62
4. Step 4: Simplify right side
   13,355.06x = 136,134,667.94
5. Step 5: Solve for x
   x = 136,134,667.94/13,355.06
6. Step 6: Final answer
   x = 10,193.49