Finding the Fourth Proportional to 12,561.51, 17,333.37 and 7,456.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,561.51 : 17,333.37 = 7,456.20 : x
2. Step 2: Convert to fraction form
   12,561.51/17,333.37 = 7,456.20/x
3. Step 3: Cross multiply
   12,561.51x = 17,333.37 × 7,456.20
4. Step 4: Simplify right side
   12,561.51x = 129,241,073.39
5. Step 5: Solve for x
   x = 129,241,073.39/12,561.51
6. Step 6: Final answer
   x = 10,288.66