Finding the Fourth Proportional to 12,994.47, 17,930.07 and 7,687.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.47 : 17,930.07 = 7,687.35 : x
2. Step 2: Convert to fraction form
   12,994.47/17,930.07 = 7,687.35/x
3. Step 3: Cross multiply
   12,994.47x = 17,930.07 × 7,687.35
4. Step 4: Simplify right side
   12,994.47x = 137,834,723.61
5. Step 5: Solve for x
   x = 137,834,723.61/12,994.47
6. Step 6: Final answer
   x = 10,607.18