Finding the Fourth Proportional to 22,301.64, 30,776.64 and 12,231

Step by Step Solution

1. Step 1: Write the proportion equation
   22,301.64 : 30,776.64 = 12,231 : x
2. Step 2: Convert to fraction form
   22,301.64/30,776.64 = 12,231/x
3. Step 3: Cross multiply
   22,301.64x = 30,776.64 × 12,231
4. Step 4: Simplify right side
   22,301.64x = 376,429,083.84
5. Step 5: Solve for x
   x = 376,429,083.84/22,301.64
6. Step 6: Final answer
   x = 16,878.99