Finding the Fourth Proportional to 22,412, 30,928.56 and 12,983.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,412 : 30,928.56 = 12,983.60 : x
2. Step 2: Convert to fraction form
   22,412/30,928.56 = 12,983.60/x
3. Step 3: Cross multiply
   22,412x = 30,928.56 × 12,983.60
4. Step 4: Simplify right side
   22,412x = 401,564,051.62
5. Step 5: Solve for x
   x = 401,564,051.62/22,412
6. Step 6: Final answer
   x = 17,917.37