Finding the Fourth Proportional to 9,363.09, 12,920.89 and 5,171.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,363.09 : 12,920.89 = 5,171.25 : x
2. Step 2: Convert to fraction form
   9,363.09/12,920.89 = 5,171.25/x
3. Step 3: Cross multiply
   9,363.09x = 12,920.89 × 5,171.25
4. Step 4: Simplify right side
   9,363.09x = 66,817,126.56
5. Step 5: Solve for x
   x = 66,817,126.56/9,363.09
6. Step 6: Final answer
   x = 7,136.23