Finding the Fourth Proportional to 12,720.54, 17,555.23 and 7,055.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.54 : 17,555.23 = 7,055.82 : x
2. Step 2: Convert to fraction form
   12,720.54/17,555.23 = 7,055.82/x
3. Step 3: Cross multiply
   12,720.54x = 17,555.23 × 7,055.82
4. Step 4: Simplify right side
   12,720.54x = 123,866,617.59
5. Step 5: Solve for x
   x = 123,866,617.59/12,720.54
6. Step 6: Final answer
   x = 9,737.53