Finding the Fourth Proportional to 12,279.73, 18,406.91 and 7,003.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.73 : 18,406.91 = 7,003.39 : x
2. Step 2: Convert to fraction form
   12,279.73/18,406.91 = 7,003.39/x
3. Step 3: Cross multiply
   12,279.73x = 18,406.91 × 7,003.39
4. Step 4: Simplify right side
   12,279.73x = 128,910,734.41
5. Step 5: Solve for x
   x = 128,910,734.41/12,279.73
6. Step 6: Final answer
   x = 10,497.85