Finding the Fourth Proportional to 3,410.70, 5,115.69 and 1,070.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,410.70 : 5,115.69 = 1,070.72 : x
2. Step 2: Convert to fraction form
   3,410.70/5,115.69 = 1,070.72/x
3. Step 3: Cross multiply
   3,410.70x = 5,115.69 × 1,070.72
4. Step 4: Simplify right side
   3,410.70x = 5,477,461.48
5. Step 5: Solve for x
   x = 5,477,461.48/3,410.70
6. Step 6: Final answer
   x = 1,605.97