Finding the Fourth Proportional to 12,685.96, 17,495.06 and 10,892.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.96 : 17,495.06 = 10,892.88 : x
2. Step 2: Convert to fraction form
   12,685.96/17,495.06 = 10,892.88/x
3. Step 3: Cross multiply
   12,685.96x = 17,495.06 × 10,892.88
4. Step 4: Simplify right side
   12,685.96x = 190,571,447.23
5. Step 5: Solve for x
   x = 190,571,447.23/12,685.96
6. Step 6: Final answer
   x = 15,022.23