Finding the Fourth Proportional to 12,687.84, 17,512.50 and 8,446.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.84 : 17,512.50 = 8,446.02 : x
2. Step 2: Convert to fraction form
   12,687.84/17,512.50 = 8,446.02/x
3. Step 3: Cross multiply
   12,687.84x = 17,512.50 × 8,446.02
4. Step 4: Simplify right side
   12,687.84x = 147,910,925.25
5. Step 5: Solve for x
   x = 147,910,925.25/12,687.84
6. Step 6: Final answer
   x = 11,657.69