Finding the Fourth Proportional to 12,985.79, 17,924.06 and 7,682.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.79 : 17,924.06 = 7,682.45 : x
2. Step 2: Convert to fraction form
   12,985.79/17,924.06 = 7,682.45/x
3. Step 3: Cross multiply
   12,985.79x = 17,924.06 × 7,682.45
4. Step 4: Simplify right side
   12,985.79x = 137,700,694.75
5. Step 5: Solve for x
   x = 137,700,694.75/12,985.79
6. Step 6: Final answer
   x = 10,603.95