Finding the Fourth Proportional to 12,688.74, 17,493.68 and 10,411.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.74 : 17,493.68 = 10,411.74 : x
2. Step 2: Convert to fraction form
   12,688.74/17,493.68 = 10,411.74/x
3. Step 3: Cross multiply
   12,688.74x = 17,493.68 × 10,411.74
4. Step 4: Simplify right side
   12,688.74x = 182,139,673.83
5. Step 5: Solve for x
   x = 182,139,673.83/12,688.74
6. Step 6: Final answer
   x = 14,354.43