Finding the Fourth Proportional to 12,719.50, 17,553.81 and 7,054.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.50 : 17,553.81 = 7,054.79 : x
2. Step 2: Convert to fraction form
   12,719.50/17,553.81 = 7,054.79/x
3. Step 3: Cross multiply
   12,719.50x = 17,553.81 × 7,054.79
4. Step 4: Simplify right side
   12,719.50x = 123,838,480.68
5. Step 5: Solve for x
   x = 123,838,480.68/12,719.50
6. Step 6: Final answer
   x = 9,736.11