Finding the Fourth Proportional to 21,020.27, 31,526.73 and 7,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,020.27 : 31,526.73 = 7,690.50 : x
2. Step 2: Convert to fraction form
   21,020.27/31,526.73 = 7,690.50/x
3. Step 3: Cross multiply
   21,020.27x = 31,526.73 × 7,690.50
4. Step 4: Simplify right side
   21,020.27x = 242,456,317.07
5. Step 5: Solve for x
   x = 242,456,317.07/21,020.27
6. Step 6: Final answer
   x = 11,534.41