Finding the Fourth Proportional to 5,317.50, 7,338.15 and 3,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,317.50 : 7,338.15 = 3,109.50 : x
2. Step 2: Convert to fraction form
   5,317.50/7,338.15 = 3,109.50/x
3. Step 3: Cross multiply
   5,317.50x = 7,338.15 × 3,109.50
4. Step 4: Simplify right side
   5,317.50x = 22,817,977.43
5. Step 5: Solve for x
   x = 22,817,977.43/5,317.50
6. Step 6: Final answer
   x = 4,291.11