Finding the Fourth Proportional to 13,003.35, 17,939.79 and 8,529.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.35 : 17,939.79 = 8,529.59 : x
2. Step 2: Convert to fraction form
   13,003.35/17,939.79 = 8,529.59/x
3. Step 3: Cross multiply
   13,003.35x = 17,939.79 × 8,529.59
4. Step 4: Simplify right side
   13,003.35x = 153,018,963.69
5. Step 5: Solve for x
   x = 153,018,963.69/13,003.35
6. Step 6: Final answer
   x = 11,767.66