Finding the Fourth Proportional to 13,141.28, 18,133.32 and 7,835.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.28 : 18,133.32 = 7,835.12 : x
2. Step 2: Convert to fraction form
   13,141.28/18,133.32 = 7,835.12/x
3. Step 3: Cross multiply
   13,141.28x = 18,133.32 × 7,835.12
4. Step 4: Simplify right side
   13,141.28x = 142,076,738.20
5. Step 5: Solve for x
   x = 142,076,738.20/13,141.28
6. Step 6: Final answer
   x = 10,811.48