Finding the Fourth Proportional to 13,199.25, 18,210.42 and 7,529.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199.25 : 18,210.42 = 7,529.89 : x
2. Step 2: Convert to fraction form
   13,199.25/18,210.42 = 7,529.89/x
3. Step 3: Cross multiply
   13,199.25x = 18,210.42 × 7,529.89
4. Step 4: Simplify right side
   13,199.25x = 137,122,459.45
5. Step 5: Solve for x
   x = 137,122,459.45/13,199.25
6. Step 6: Final answer
   x = 10,388.66