Finding the Fourth Proportional to 10,680.12, 14,720.94 and 7,142.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.12 : 14,720.94 = 7,142.04 : x
2. Step 2: Convert to fraction form
   10,680.12/14,720.94 = 7,142.04/x
3. Step 3: Cross multiply
   10,680.12x = 14,720.94 × 7,142.04
4. Step 4: Simplify right side
   10,680.12x = 105,137,542.32
5. Step 5: Solve for x
   x = 105,137,542.32/10,680.12
6. Step 6: Final answer
   x = 9,844.23