Finding the Fourth Proportional to 22,429.98, 30,951.72 and 12,998.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,429.98 : 30,951.72 = 12,998.34 : x
2. Step 2: Convert to fraction form
   22,429.98/30,951.72 = 12,998.34/x
3. Step 3: Cross multiply
   22,429.98x = 30,951.72 × 12,998.34
4. Step 4: Simplify right side
   22,429.98x = 402,320,980.14
5. Step 5: Solve for x
   x = 402,320,980.14/22,429.98
6. Step 6: Final answer
   x = 17,936.75