Finding the Fourth Proportional to 21,169.49, 31,742.87 and 7,124.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,169.49 : 31,742.87 = 7,124.83 : x
2. Step 2: Convert to fraction form
   21,169.49/31,742.87 = 7,124.83/x
3. Step 3: Cross multiply
   21,169.49x = 31,742.87 × 7,124.83
4. Step 4: Simplify right side
   21,169.49x = 226,162,437.48
5. Step 5: Solve for x
   x = 226,162,437.48/21,169.49
6. Step 6: Final answer
   x = 10,683.42