Finding the Fourth Proportional to 13,148.73, 18,145.62 and 7,181.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.73 : 18,145.62 = 7,181.06 : x
2. Step 2: Convert to fraction form
   13,148.73/18,145.62 = 7,181.06/x
3. Step 3: Cross multiply
   13,148.73x = 18,145.62 × 7,181.06
4. Step 4: Simplify right side
   13,148.73x = 130,304,695.23
5. Step 5: Solve for x
   x = 130,304,695.23/13,148.73
6. Step 6: Final answer
   x = 9,910.06