Finding the Fourth Proportional to 12,719.90, 17,554.38 and 7,055.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.90 : 17,554.38 = 7,055.20 : x
2. Step 2: Convert to fraction form
   12,719.90/17,554.38 = 7,055.20/x
3. Step 3: Cross multiply
   12,719.90x = 17,554.38 × 7,055.20
4. Step 4: Simplify right side
   12,719.90x = 123,849,661.78
5. Step 5: Solve for x
   x = 123,849,661.78/12,719.90
6. Step 6: Final answer
   x = 9,736.69