Finding the Fourth Proportional to 22,253.93, 30,706.56 and 12,820.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,253.93 : 30,706.56 = 12,820.67 : x
2. Step 2: Convert to fraction form
   22,253.93/30,706.56 = 12,820.67/x
3. Step 3: Cross multiply
   22,253.93x = 30,706.56 × 12,820.67
4. Step 4: Simplify right side
   22,253.93x = 393,678,672.60
5. Step 5: Solve for x
   x = 393,678,672.60/22,253.93
6. Step 6: Final answer
   x = 17,690.30