Finding the Fourth Proportional to 12,653.56, 17,485.12 and 10,969.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,653.56 : 17,485.12 = 10,969.56 : x
2. Step 2: Convert to fraction form
   12,653.56/17,485.12 = 10,969.56/x
3. Step 3: Cross multiply
   12,653.56x = 17,485.12 × 10,969.56
4. Step 4: Simplify right side
   12,653.56x = 191,804,072.95
5. Step 5: Solve for x
   x = 191,804,072.95/12,653.56
6. Step 6: Final answer
   x = 15,158.11