Finding the Fourth Proportional to 12,994.01, 17,930.76 and 7,687.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.01 : 17,930.76 = 7,687.79 : x
2. Step 2: Convert to fraction form
   12,994.01/17,930.76 = 7,687.79/x
3. Step 3: Cross multiply
   12,994.01x = 17,930.76 × 7,687.79
4. Step 4: Simplify right side
   12,994.01x = 137,847,917.42
5. Step 5: Solve for x
   x = 137,847,917.42/12,994.01
6. Step 6: Final answer
   x = 10,608.57