Finding the Fourth Proportional to 9,109.26, 12,572.01 and 5,131.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.26 : 12,572.01 = 5,131.15 : x
2. Step 2: Convert to fraction form
   9,109.26/12,572.01 = 5,131.15/x
3. Step 3: Cross multiply
   9,109.26x = 12,572.01 × 5,131.15
4. Step 4: Simplify right side
   9,109.26x = 64,508,837.68
5. Step 5: Solve for x
   x = 64,508,837.68/9,109.26
6. Step 6: Final answer
   x = 7,081.68