Finding the Fourth Proportional to 22,820.02, 31,489.80 and 12,747.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.02 : 31,489.80 = 12,747.67 : x
2. Step 2: Convert to fraction form
   22,820.02/31,489.80 = 12,747.67/x
3. Step 3: Cross multiply
   22,820.02x = 31,489.80 × 12,747.67
4. Step 4: Simplify right side
   22,820.02x = 401,421,578.77
5. Step 5: Solve for x
   x = 401,421,578.77/22,820.02
6. Step 6: Final answer
   x = 17,590.76