Finding the Fourth Proportional to 13,230.89, 18,258.56 and 7,181.00

Step by Step Solution

1. Step 1: Write the proportion equation
   13,230.89 : 18,258.56 = 7,181.00 : x
2. Step 2: Convert to fraction form
   13,230.89/18,258.56 = 7,181.00/x
3. Step 3: Cross multiply
   13,230.89x = 18,258.56 × 7,181.00
4. Step 4: Simplify right side
   13,230.89x = 131,114,830.66
5. Step 5: Solve for x
   x = 131,114,830.66/13,230.89
6. Step 6: Final answer
   x = 9,909.75