Finding the Fourth Proportional to 7,279.50, 10,045.72 and 3,967.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,279.50 : 10,045.72 = 3,967.50 : x
2. Step 2: Convert to fraction form
   7,279.50/10,045.72 = 3,967.50/x
3. Step 3: Cross multiply
   7,279.50x = 10,045.72 × 3,967.50
4. Step 4: Simplify right side
   7,279.50x = 39,856,394.10
5. Step 5: Solve for x
   x = 39,856,394.10/7,279.50
6. Step 6: Final answer
   x = 5,475.16