Finding the Fourth Proportional to 21,003.73, 31,453.72 and 15,654.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,003.73 : 31,453.72 = 15,654.08 : x
2. Step 2: Convert to fraction form
   21,003.73/31,453.72 = 15,654.08/x
3. Step 3: Cross multiply
   21,003.73x = 31,453.72 × 15,654.08
4. Step 4: Simplify right side
   21,003.73x = 492,379,034.46
5. Step 5: Solve for x
   x = 492,379,034.46/21,003.73
6. Step 6: Final answer
   x = 23,442.46