Finding the Fourth Proportional to 20,925.38, 31,309.38 and 12,460.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,925.38 : 31,309.38 = 12,460.82 : x
2. Step 2: Convert to fraction form
   20,925.38/31,309.38 = 12,460.82/x
3. Step 3: Cross multiply
   20,925.38x = 31,309.38 × 12,460.82
4. Step 4: Simplify right side
   20,925.38x = 390,140,548.49
5. Step 5: Solve for x
   x = 390,140,548.49/20,925.38
6. Step 6: Final answer
   x = 18,644.37