Finding the Fourth Proportional to 9,180.87, 12,669.91 and 5,147.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,180.87 : 12,669.91 = 5,147.87 : x
2. Step 2: Convert to fraction form
   9,180.87/12,669.91 = 5,147.87/x
3. Step 3: Cross multiply
   9,180.87x = 12,669.91 × 5,147.87
4. Step 4: Simplify right side
   9,180.87x = 65,223,049.59
5. Step 5: Solve for x
   x = 65,223,049.59/9,180.87
6. Step 6: Final answer
   x = 7,104.23