Finding the Fourth Proportional to 13,150.72, 18,148.56 and 7,774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.72 : 18,148.56 = 7,774.72 : x
2. Step 2: Convert to fraction form
   13,150.72/18,148.56 = 7,774.72/x
3. Step 3: Cross multiply
   13,150.72x = 18,148.56 × 7,774.72
4. Step 4: Simplify right side
   13,150.72x = 141,099,972.40
5. Step 5: Solve for x
   x = 141,099,972.40/13,150.72
6. Step 6: Final answer
   x = 10,729.45