Finding the Fourth Proportional to 9,189.37, 12,683.59 and 5,212.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.37 : 12,683.59 = 5,212.81 : x
2. Step 2: Convert to fraction form
   9,189.37/12,683.59 = 5,212.81/x
3. Step 3: Cross multiply
   9,189.37x = 12,683.59 × 5,212.81
4. Step 4: Simplify right side
   9,189.37x = 66,117,144.79
5. Step 5: Solve for x
   x = 66,117,144.79/9,189.37
6. Step 6: Final answer
   x = 7,194.96