Finding the Fourth Proportional to 6,128.78, 8,457.69 and 3,334.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.78 : 8,457.69 = 3,334.34 : x
2. Step 2: Convert to fraction form
   6,128.78/8,457.69 = 3,334.34/x
3. Step 3: Cross multiply
   6,128.78x = 8,457.69 × 3,334.34
4. Step 4: Simplify right side
   6,128.78x = 28,200,814.07
5. Step 5: Solve for x
   x = 28,200,814.07/6,128.78
6. Step 6: Final answer
   x = 4,601.37