Finding the Fourth Proportional to 12,884.99, 17,781.72 and 12,294.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,884.99 : 17,781.72 = 12,294.50 : x
2. Step 2: Convert to fraction form
   12,884.99/17,781.72 = 12,294.50/x
3. Step 3: Cross multiply
   12,884.99x = 17,781.72 × 12,294.50
4. Step 4: Simplify right side
   12,884.99x = 218,617,267.63
5. Step 5: Solve for x
   x = 218,617,267.63/12,884.99
6. Step 6: Final answer
   x = 16,966.82