Finding the Fourth Proportional to 21,969.96, 30,320.10 and 12,539.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,969.96 : 30,320.10 = 12,539.94 : x
2. Step 2: Convert to fraction form
   21,969.96/30,320.10 = 12,539.94/x
3. Step 3: Cross multiply
   21,969.96x = 30,320.10 × 12,539.94
4. Step 4: Simplify right side
   21,969.96x = 380,212,234.79
5. Step 5: Solve for x
   x = 380,212,234.79/21,969.96
6. Step 6: Final answer
   x = 17,306.00