Finding the Fourth Proportional to 3,128.07, 4,307.98 and 3,060.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.07 : 4,307.98 = 3,060.03 : x
2. Step 2: Convert to fraction form
   3,128.07/4,307.98 = 3,060.03/x
3. Step 3: Cross multiply
   3,128.07x = 4,307.98 × 3,060.03
4. Step 4: Simplify right side
   3,128.07x = 13,182,548.04
5. Step 5: Solve for x
   x = 13,182,548.04/3,128.07
6. Step 6: Final answer
   x = 4,214.28