Finding the Fourth Proportional to 13,148.83, 18,145.82 and 7,180.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.83 : 18,145.82 = 7,180.85 : x
2. Step 2: Convert to fraction form
   13,148.83/18,145.82 = 7,180.85/x
3. Step 3: Cross multiply
   13,148.83x = 18,145.82 × 7,180.85
4. Step 4: Simplify right side
   13,148.83x = 130,302,474.86
5. Step 5: Solve for x
   x = 130,302,474.86/13,148.83
6. Step 6: Final answer
   x = 9,909.81