Finding the Fourth Proportional to 3,455.34, 5,180.28 and 3,451.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,455.34 : 5,180.28 = 3,451.09 : x
2. Step 2: Convert to fraction form
   3,455.34/5,180.28 = 3,451.09/x
3. Step 3: Cross multiply
   3,455.34x = 5,180.28 × 3,451.09
4. Step 4: Simplify right side
   3,455.34x = 17,877,630.31
5. Step 5: Solve for x
   x = 17,877,630.31/3,455.34
6. Step 6: Final answer
   x = 5,173.91