Finding the Fourth Proportional to 6,128.31, 8,457.11 and 3,333.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.31 : 8,457.11 = 3,333.81 : x
2. Step 2: Convert to fraction form
   6,128.31/8,457.11 = 3,333.81/x
3. Step 3: Cross multiply
   6,128.31x = 8,457.11 × 3,333.81
4. Step 4: Simplify right side
   6,128.31x = 28,194,397.89
5. Step 5: Solve for x
   x = 28,194,397.89/6,128.31
6. Step 6: Final answer
   x = 4,600.68