Finding the Fourth Proportional to 6,128.99, 8,455.55 and 3,607.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.99 : 8,455.55 = 3,607.10 : x
2. Step 2: Convert to fraction form
   6,128.99/8,455.55 = 3,607.10/x
3. Step 3: Cross multiply
   6,128.99x = 8,455.55 × 3,607.10
4. Step 4: Simplify right side
   6,128.99x = 30,499,954.09
5. Step 5: Solve for x
   x = 30,499,954.09/6,128.99
6. Step 6: Final answer
   x = 4,976.35