Finding the Fourth Proportional to 3,167.30, 4,279.50 and 3,167.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,167.30 : 4,279.50 = 3,167.30 : x
2. Step 2: Convert to fraction form
   3,167.30/4,279.50 = 3,167.30/x
3. Step 3: Cross multiply
   3,167.30x = 4,279.50 × 3,167.30
4. Step 4: Simplify right side
   3,167.30x = 13,554,460.35
5. Step 5: Solve for x
   x = 13,554,460.35/3,167.30
6. Step 6: Final answer
   x = 4,279.50