Finding the Fourth Proportional to 13,142.14, 18,131.48 and 7,763.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.14 : 18,131.48 = 7,763.42 : x
2. Step 2: Convert to fraction form
   13,142.14/18,131.48 = 7,763.42/x
3. Step 3: Cross multiply
   13,142.14x = 18,131.48 × 7,763.42
4. Step 4: Simplify right side
   13,142.14x = 140,762,294.46
5. Step 5: Solve for x
   x = 140,762,294.46/13,142.14
6. Step 6: Final answer
   x = 10,710.76