Finding the Fourth Proportional to 21,790.37, 30,060.71 and 12,833.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,790.37 : 30,060.71 = 12,833.58 : x
2. Step 2: Convert to fraction form
   21,790.37/30,060.71 = 12,833.58/x
3. Step 3: Cross multiply
   21,790.37x = 30,060.71 × 12,833.58
4. Step 4: Simplify right side
   21,790.37x = 385,786,312.17
5. Step 5: Solve for x
   x = 385,786,312.17/21,790.37
6. Step 6: Final answer
   x = 17,704.44