Finding the Fourth Proportional to 12,086.96, 16,685.84 and 7,612.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.96 : 16,685.84 = 7,612.88 : x
2. Step 2: Convert to fraction form
   12,086.96/16,685.84 = 7,612.88/x
3. Step 3: Cross multiply
   12,086.96x = 16,685.84 × 7,612.88
4. Step 4: Simplify right side
   12,086.96x = 127,027,297.62
5. Step 5: Solve for x
   x = 127,027,297.62/12,086.96
6. Step 6: Final answer
   x = 10,509.45