Finding the Fourth Proportional to 12,924.59, 19,390.10 and 3,690.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,924.59 : 19,390.10 = 3,690.59 : x
2. Step 2: Convert to fraction form
   12,924.59/19,390.10 = 3,690.59/x
3. Step 3: Cross multiply
   12,924.59x = 19,390.10 × 3,690.59
4. Step 4: Simplify right side
   12,924.59x = 71,560,793.76
5. Step 5: Solve for x
   x = 71,560,793.76/12,924.59
6. Step 6: Final answer
   x = 5,536.80