Finding the Fourth Proportional to 12,300.85, 18,452.37 and 5,279.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.85 : 18,452.37 = 5,279.28 : x
2. Step 2: Convert to fraction form
   12,300.85/18,452.37 = 5,279.28/x
3. Step 3: Cross multiply
   12,300.85x = 18,452.37 × 5,279.28
4. Step 4: Simplify right side
   12,300.85x = 97,415,252.59
5. Step 5: Solve for x
   x = 97,415,252.59/12,300.85
6. Step 6: Final answer
   x = 7,919.39