Finding the Fourth Proportional to 22,404.11, 30,928.16 and 12,970.85

Step by Step Solution

1. Step 1: Write the proportion equation
   22,404.11 : 30,928.16 = 12,970.85 : x
2. Step 2: Convert to fraction form
   22,404.11/30,928.16 = 12,970.85/x
3. Step 3: Cross multiply
   22,404.11x = 30,928.16 × 12,970.85
4. Step 4: Simplify right side
   22,404.11x = 401,164,401.92
5. Step 5: Solve for x
   x = 401,164,401.92/22,404.11
6. Step 6: Final answer
   x = 17,905.84