Finding the Fourth Proportional to 22,928.56, 31,639.16 and 12,985.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,928.56 : 31,639.16 = 12,985.52 : x
2. Step 2: Convert to fraction form
   22,928.56/31,639.16 = 12,985.52/x
3. Step 3: Cross multiply
   22,928.56x = 31,639.16 × 12,985.52
4. Step 4: Simplify right side
   22,928.56x = 410,850,944.96
5. Step 5: Solve for x
   x = 410,850,944.96/22,928.56
6. Step 6: Final answer
   x = 17,918.74