Finding the Fourth Proportional to 12,434.88, 17,172.90 and 10,656.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.88 : 17,172.90 = 10,656.12 : x
2. Step 2: Convert to fraction form
   12,434.88/17,172.90 = 10,656.12/x
3. Step 3: Cross multiply
   12,434.88x = 17,172.90 × 10,656.12
4. Step 4: Simplify right side
   12,434.88x = 182,996,483.15
5. Step 5: Solve for x
   x = 182,996,483.15/12,434.88
6. Step 6: Final answer
   x = 14,716.39