Finding the Fourth Proportional to 21,019.56, 31,522.44 and 7,689.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.56 : 31,522.44 = 7,689.48 : x
2. Step 2: Convert to fraction form
   21,019.56/31,522.44 = 7,689.48/x
3. Step 3: Cross multiply
   21,019.56x = 31,522.44 × 7,689.48
4. Step 4: Simplify right side
   21,019.56x = 242,391,171.93
5. Step 5: Solve for x
   x = 242,391,171.93/21,019.56
6. Step 6: Final answer
   x = 11,531.70