Finding the Fourth Proportional to 14,042.81, 21,080.42 and 7,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,042.81 : 21,080.42 = 7,131.89 : x
2. Step 2: Convert to fraction form
   14,042.81/21,080.42 = 7,131.89/x
3. Step 3: Cross multiply
   14,042.81x = 21,080.42 × 7,131.89
4. Step 4: Simplify right side
   14,042.81x = 150,343,280.38
5. Step 5: Solve for x
   x = 150,343,280.38/14,042.81
6. Step 6: Final answer
   x = 10,706.07