Finding the Fourth Proportional to 3,679.18, 5,546.34 and 3,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,679.18 : 5,546.34 = 3,434.78 : x
2. Step 2: Convert to fraction form
   3,679.18/5,546.34 = 3,434.78/x
3. Step 3: Cross multiply
   3,679.18x = 5,546.34 × 3,434.78
4. Step 4: Simplify right side
   3,679.18x = 19,050,457.71
5. Step 5: Solve for x
   x = 19,050,457.71/3,679.18
6. Step 6: Final answer
   x = 5,177.91