Finding the Fourth Proportional to 21,926.31, 30,255.98 and 12,974.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,926.31 : 30,255.98 = 12,974.19 : x
2. Step 2: Convert to fraction form
   21,926.31/30,255.98 = 12,974.19/x
3. Step 3: Cross multiply
   21,926.31x = 30,255.98 × 12,974.19
4. Step 4: Simplify right side
   21,926.31x = 392,546,768.29
5. Step 5: Solve for x
   x = 392,546,768.29/21,926.31
6. Step 6: Final answer
   x = 17,903.00