Finding the Fourth Proportional to 9,189.35, 12,681.42 and 5,210.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.35 : 12,681.42 = 5,210.37 : x
2. Step 2: Convert to fraction form
   9,189.35/12,681.42 = 5,210.37/x
3. Step 3: Cross multiply
   9,189.35x = 12,681.42 × 5,210.37
4. Step 4: Simplify right side
   9,189.35x = 66,074,890.33
5. Step 5: Solve for x
   x = 66,074,890.33/9,189.35
6. Step 6: Final answer
   x = 7,190.38