Finding the Fourth Proportional to 22,764.64, 31,414 and 12,828

Step by Step Solution

1. Step 1: Write the proportion equation
   22,764.64 : 31,414 = 12,828 : x
2. Step 2: Convert to fraction form
   22,764.64/31,414 = 12,828/x
3. Step 3: Cross multiply
   22,764.64x = 31,414 × 12,828
4. Step 4: Simplify right side
   22,764.64x = 402,978,792
5. Step 5: Solve for x
   x = 402,978,792/22,764.64
6. Step 6: Final answer
   x = 17,701.96