Finding the Fourth Proportional to 25,938.89, 38,920.49 and 12,784.09

Step by Step Solution

1. Step 1: Write the proportion equation
   25,938.89 : 38,920.49 = 12,784.09 : x
2. Step 2: Convert to fraction form
   25,938.89/38,920.49 = 12,784.09/x
3. Step 3: Cross multiply
   25,938.89x = 38,920.49 × 12,784.09
4. Step 4: Simplify right side
   25,938.89x = 497,562,788.48
5. Step 5: Solve for x
   x = 497,562,788.48/25,938.89
6. Step 6: Final answer
   x = 19,182.12