Finding the Fourth Proportional to 13,149.88, 18,146.72 and 7,181.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,149.88 : 18,146.72 = 7,181.52 : x
2. Step 2: Convert to fraction form
   13,149.88/18,146.72 = 7,181.52/x
3. Step 3: Cross multiply
   13,149.88x = 18,146.72 × 7,181.52
4. Step 4: Simplify right side
   13,149.88x = 130,321,032.61
5. Step 5: Solve for x
   x = 130,321,032.61/13,149.88
6. Step 6: Final answer
   x = 9,910.44