Finding the Fourth Proportional to 12,722.19, 17,556.74 and 7,057.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.19 : 17,556.74 = 7,057.00 : x
2. Step 2: Convert to fraction form
   12,722.19/17,556.74 = 7,057.00/x
3. Step 3: Cross multiply
   12,722.19x = 17,556.74 × 7,057.00
4. Step 4: Simplify right side
   12,722.19x = 123,898,001.43
5. Step 5: Solve for x
   x = 123,898,001.43/12,722.19
6. Step 6: Final answer
   x = 9,738.73