Finding the Fourth Proportional to 19,784.86, 27,303.45 and 12,231

Step by Step Solution

1. Step 1: Write the proportion equation
   19,784.86 : 27,303.45 = 12,231 : x
2. Step 2: Convert to fraction form
   19,784.86/27,303.45 = 12,231/x
3. Step 3: Cross multiply
   19,784.86x = 27,303.45 × 12,231
4. Step 4: Simplify right side
   19,784.86x = 333,948,496.95
5. Step 5: Solve for x
   x = 333,948,496.95/19,784.86
6. Step 6: Final answer
   x = 16,878.99