Finding the Fourth Proportional to 21,126, 31,683.96 and 7,086.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,126 : 31,683.96 = 7,086.52 : x
2. Step 2: Convert to fraction form
   21,126/31,683.96 = 7,086.52/x
3. Step 3: Cross multiply
   21,126x = 31,683.96 × 7,086.52
4. Step 4: Simplify right side
   21,126x = 224,529,016.22
5. Step 5: Solve for x
   x = 224,529,016.22/21,126
6. Step 6: Final answer
   x = 10,628.09