Finding the Fourth Proportional to 31,111.72, 46,648.81 and 12,394.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111.72 : 46,648.81 = 12,394.64 : x
2. Step 2: Convert to fraction form
   31,111.72/46,648.81 = 12,394.64/x
3. Step 3: Cross multiply
   31,111.72x = 46,648.81 × 12,394.64
4. Step 4: Simplify right side
   31,111.72x = 578,195,338.49
5. Step 5: Solve for x
   x = 578,195,338.49/31,111.72
6. Step 6: Final answer
   x = 18,584.49