Finding the Fourth Proportional to 12,661.80, 17,473.28 and 7,356.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.80 : 17,473.28 = 7,356.96 : x
2. Step 2: Convert to fraction form
   12,661.80/17,473.28 = 7,356.96/x
3. Step 3: Cross multiply
   12,661.80x = 17,473.28 × 7,356.96
4. Step 4: Simplify right side
   12,661.80x = 128,550,222.03
5. Step 5: Solve for x
   x = 128,550,222.03/12,661.80
6. Step 6: Final answer
   x = 10,152.60