Finding the Fourth Proportional to 21,123.23, 31,683.83 and 7,083.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.23 : 31,683.83 = 7,083.45 : x
2. Step 2: Convert to fraction form
   21,123.23/31,683.83 = 7,083.45/x
3. Step 3: Cross multiply
   21,123.23x = 31,683.83 × 7,083.45
4. Step 4: Simplify right side
   21,123.23x = 224,430,790.20
5. Step 5: Solve for x
   x = 224,430,790.20/21,123.23
6. Step 6: Final answer
   x = 10,624.84