Finding the Fourth Proportional to 12,319.35, 16,999.79 and 7,540.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,319.35 : 16,999.79 = 7,540.06 : x
2. Step 2: Convert to fraction form
   12,319.35/16,999.79 = 7,540.06/x
3. Step 3: Cross multiply
   12,319.35x = 16,999.79 × 7,540.06
4. Step 4: Simplify right side
   12,319.35x = 128,179,436.59
5. Step 5: Solve for x
   x = 128,179,436.59/12,319.35
6. Step 6: Final answer
   x = 10,404.72