Finding the Fourth Proportional to 31,584.54, 47,404.56 and 12,864.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,584.54 : 47,404.56 = 12,864.54 : x
2. Step 2: Convert to fraction form
   31,584.54/47,404.56 = 12,864.54/x
3. Step 3: Cross multiply
   31,584.54x = 47,404.56 × 12,864.54
4. Step 4: Simplify right side
   31,584.54x = 609,837,858.30
5. Step 5: Solve for x
   x = 609,837,858.30/31,584.54
6. Step 6: Final answer
   x = 19,308.11