Finding the Fourth Proportional to 13,142.43, 18,134.37 and 7,835.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.43 : 18,134.37 = 7,835.31 : x
2. Step 2: Convert to fraction form
   13,142.43/18,134.37 = 7,835.31/x
3. Step 3: Cross multiply
   13,142.43x = 18,134.37 × 7,835.31
4. Step 4: Simplify right side
   13,142.43x = 142,088,410.60
5. Step 5: Solve for x
   x = 142,088,410.60/13,142.43
6. Step 6: Final answer
   x = 10,811.43