Finding the Fourth Proportional to 13,156.72, 18,150.28 and 7,849.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,156.72 : 18,150.28 = 7,849.60 : x
2. Step 2: Convert to fraction form
   13,156.72/18,150.28 = 7,849.60/x
3. Step 3: Cross multiply
   13,156.72x = 18,150.28 × 7,849.60
4. Step 4: Simplify right side
   13,156.72x = 142,472,372.89
5. Step 5: Solve for x
   x = 142,472,372.89/13,156.72
6. Step 6: Final answer
   x = 10,828.87