Finding the Fourth Proportional to 21,152.38, 31,729.08 and 7,112.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.38 : 31,729.08 = 7,112.59 : x
2. Step 2: Convert to fraction form
   21,152.38/31,729.08 = 7,112.59/x
3. Step 3: Cross multiply
   21,152.38x = 31,729.08 × 7,112.59
4. Step 4: Simplify right side
   21,152.38x = 225,675,937.12
5. Step 5: Solve for x
   x = 225,675,937.12/21,152.38
6. Step 6: Final answer
   x = 10,669.06