Finding the Fourth Proportional to 12,688.96, 17,499.19 and 10,895.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.96 : 17,499.19 = 10,895.88 : x
2. Step 2: Convert to fraction form
   12,688.96/17,499.19 = 10,895.88/x
3. Step 3: Cross multiply
   12,688.96x = 17,499.19 × 10,895.88
4. Step 4: Simplify right side
   12,688.96x = 190,669,074.34
5. Step 5: Solve for x
   x = 190,669,074.34/12,688.96
6. Step 6: Final answer
   x = 15,026.38