Finding the Fourth Proportional to 6,128.72, 8,459.37 and 3,612.29

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.72 : 8,459.37 = 3,612.29 : x
2. Step 2: Convert to fraction form
   6,128.72/8,459.37 = 3,612.29/x
3. Step 3: Cross multiply
   6,128.72x = 8,459.37 × 3,612.29
4. Step 4: Simplify right side
   6,128.72x = 30,557,637.30
5. Step 5: Solve for x
   x = 30,557,637.30/6,128.72
6. Step 6: Final answer
   x = 4,985.98