Finding the Fourth Proportional to 10,690.30, 16,021.33 and 7,738.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,690.30 : 16,021.33 = 7,738.62 : x
2. Step 2: Convert to fraction form
   10,690.30/16,021.33 = 7,738.62/x
3. Step 3: Cross multiply
   10,690.30x = 16,021.33 × 7,738.62
4. Step 4: Simplify right side
   10,690.30x = 123,982,905.34
5. Step 5: Solve for x
   x = 123,982,905.34/10,690.30
6. Step 6: Final answer
   x = 11,597.70