Finding the Fourth Proportional to 12,996.83, 17,934.54 and 7,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,996.83 : 17,934.54 = 7,690.72 : x
2. Step 2: Convert to fraction form
   12,996.83/17,934.54 = 7,690.72/x
3. Step 3: Cross multiply
   12,996.83x = 17,934.54 × 7,690.72
4. Step 4: Simplify right side
   12,996.83x = 137,929,525.47
5. Step 5: Solve for x
   x = 137,929,525.47/12,996.83
6. Step 6: Final answer
   x = 10,612.55