Finding the Fourth Proportional to 9,109.14, 12,571.82 and 5,131.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.14 : 12,571.82 = 5,131.04 : x
2. Step 2: Convert to fraction form
   9,109.14/12,571.82 = 5,131.04/x
3. Step 3: Cross multiply
   9,109.14x = 12,571.82 × 5,131.04
4. Step 4: Simplify right side
   9,109.14x = 64,506,511.29
5. Step 5: Solve for x
   x = 64,506,511.29/9,109.14
6. Step 6: Final answer
   x = 7,081.51