Finding the Fourth Proportional to 13,142.03, 18,138.33 and 7,837.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.03 : 18,138.33 = 7,837.18 : x
2. Step 2: Convert to fraction form
   13,142.03/18,138.33 = 7,837.18/x
3. Step 3: Cross multiply
   13,142.03x = 18,138.33 × 7,837.18
4. Step 4: Simplify right side
   13,142.03x = 142,153,311.76
5. Step 5: Solve for x
   x = 142,153,311.76/13,142.03
6. Step 6: Final answer
   x = 10,816.70