Finding the Fourth Proportional to 22,991.54, 31,725.05 and 12,919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,991.54 : 31,725.05 = 12,919.50 : x
2. Step 2: Convert to fraction form
   22,991.54/31,725.05 = 12,919.50/x
3. Step 3: Cross multiply
   22,991.54x = 31,725.05 × 12,919.50
4. Step 4: Simplify right side
   22,991.54x = 409,871,624.85
5. Step 5: Solve for x
   x = 409,871,624.85/22,991.54
6. Step 6: Final answer
   x = 17,827.06