Finding the Fourth Proportional to 21,123.30, 31,673.24 and 8,652.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.30 : 31,673.24 = 8,652.08 : x
2. Step 2: Convert to fraction form
   21,123.30/31,673.24 = 8,652.08/x
3. Step 3: Cross multiply
   21,123.30x = 31,673.24 × 8,652.08
4. Step 4: Simplify right side
   21,123.30x = 274,039,406.34
5. Step 5: Solve for x
   x = 274,039,406.34/21,123.30
6. Step 6: Final answer
   x = 12,973.32