Finding the Fourth Proportional to 9,429.12, 13,012.41 and 5,180.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.12 : 13,012.41 = 5,180.25 : x
2. Step 2: Convert to fraction form
   9,429.12/13,012.41 = 5,180.25/x
3. Step 3: Cross multiply
   9,429.12x = 13,012.41 × 5,180.25
4. Step 4: Simplify right side
   9,429.12x = 67,407,511.00
5. Step 5: Solve for x
   x = 67,407,511.00/9,429.12
6. Step 6: Final answer
   x = 7,148.86