Finding the Fourth Proportional to 22,986.42, 34,459.87 and 7,991.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,986.42 : 34,459.87 = 7,991.57 : x
2. Step 2: Convert to fraction form
   22,986.42/34,459.87 = 7,991.57/x
3. Step 3: Cross multiply
   22,986.42x = 34,459.87 × 7,991.57
4. Step 4: Simplify right side
   22,986.42x = 275,388,463.30
5. Step 5: Solve for x
   x = 275,388,463.30/22,986.42
6. Step 6: Final answer
   x = 11,980.49