Finding the Fourth Proportional to 22,788.15, 31,447.54 and 12,716

Step by Step Solution

1. Step 1: Write the proportion equation
   22,788.15 : 31,447.54 = 12,716 : x
2. Step 2: Convert to fraction form
   22,788.15/31,447.54 = 12,716/x
3. Step 3: Cross multiply
   22,788.15x = 31,447.54 × 12,716
4. Step 4: Simplify right side
   22,788.15x = 399,886,918.64
5. Step 5: Solve for x
   x = 399,886,918.64/22,788.15
6. Step 6: Final answer
   x = 17,548.02