Finding the Fourth Proportional to 9,390.34, 12,958.68 and 5,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.34 : 12,958.68 = 5,198.50 : x
2. Step 2: Convert to fraction form
   9,390.34/12,958.68 = 5,198.50/x
3. Step 3: Cross multiply
   9,390.34x = 12,958.68 × 5,198.50
4. Step 4: Simplify right side
   9,390.34x = 67,365,697.98
5. Step 5: Solve for x
   x = 67,365,697.98/9,390.34
6. Step 6: Final answer
   x = 7,173.94