Finding the Fourth Proportional to 22,557.68, 31,129.48 and 12,994.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,557.68 : 31,129.48 = 12,994.12 : x
2. Step 2: Convert to fraction form
   22,557.68/31,129.48 = 12,994.12/x
3. Step 3: Cross multiply
   22,557.68x = 31,129.48 × 12,994.12
4. Step 4: Simplify right side
   22,557.68x = 404,500,198.66
5. Step 5: Solve for x
   x = 404,500,198.66/22,557.68
6. Step 6: Final answer
   x = 17,931.82