Finding the Fourth Proportional to 5,906.79, 8,152.55 and 3,390.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,906.79 : 8,152.55 = 3,390.60 : x
2. Step 2: Convert to fraction form
   5,906.79/8,152.55 = 3,390.60/x
3. Step 3: Cross multiply
   5,906.79x = 8,152.55 × 3,390.60
4. Step 4: Simplify right side
   5,906.79x = 27,642,064.89
5. Step 5: Solve for x
   x = 27,642,064.89/5,906.79
6. Step 6: Final answer
   x = 4,679.71