Finding the Fourth Proportional to 13,185.42, 18,196.32 and 7,521

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.42 : 18,196.32 = 7,521 : x
2. Step 2: Convert to fraction form
   13,185.42/18,196.32 = 7,521/x
3. Step 3: Cross multiply
   13,185.42x = 18,196.32 × 7,521
4. Step 4: Simplify right side
   13,185.42x = 136,854,522.72
5. Step 5: Solve for x
   x = 136,854,522.72/13,185.42
6. Step 6: Final answer
   x = 10,379.23