Finding the Fourth Proportional to 9,401.28, 12,973.86 and 5,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.28 : 12,973.86 = 5,209.50 : x
2. Step 2: Convert to fraction form
   9,401.28/12,973.86 = 5,209.50/x
3. Step 3: Cross multiply
   9,401.28x = 12,973.86 × 5,209.50
4. Step 4: Simplify right side
   9,401.28x = 67,587,323.67
5. Step 5: Solve for x
   x = 67,587,323.67/9,401.28
6. Step 6: Final answer
   x = 7,189.16