Finding the Fourth Proportional to 21,833.55, 30,133.92 and 12,883.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,833.55 : 30,133.92 = 12,883.25 : x
2. Step 2: Convert to fraction form
   21,833.55/30,133.92 = 12,883.25/x
3. Step 3: Cross multiply
   21,833.55x = 30,133.92 × 12,883.25
4. Step 4: Simplify right side
   21,833.55x = 388,222,674.17
5. Step 5: Solve for x
   x = 388,222,674.17/21,833.55
6. Step 6: Final answer
   x = 17,781.01