Finding the Fourth Proportional to 21,073.37, 31,625.61 and 9,980.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,073.37 : 31,625.61 = 9,980.04 : x
2. Step 2: Convert to fraction form
   21,073.37/31,625.61 = 9,980.04/x
3. Step 3: Cross multiply
   21,073.37x = 31,625.61 × 9,980.04
4. Step 4: Simplify right side
   21,073.37x = 315,624,756.10
5. Step 5: Solve for x
   x = 315,624,756.10/21,073.37
6. Step 6: Final answer
   x = 14,977.42