Finding the Fourth Proportional to 3,128.83, 4,309.02 and 3,060.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.83 : 4,309.02 = 3,060.79 : x
2. Step 2: Convert to fraction form
   3,128.83/4,309.02 = 3,060.79/x
3. Step 3: Cross multiply
   3,128.83x = 4,309.02 × 3,060.79
4. Step 4: Simplify right side
   3,128.83x = 13,189,005.33
5. Step 5: Solve for x
   x = 13,189,005.33/3,128.83
6. Step 6: Final answer
   x = 4,215.32