Finding the Fourth Proportional to 2,713.55, 4,070.78 and 1,070.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.55 : 4,070.78 = 1,070.15 : x
2. Step 2: Convert to fraction form
   2,713.55/4,070.78 = 1,070.15/x
3. Step 3: Cross multiply
   2,713.55x = 4,070.78 × 1,070.15
4. Step 4: Simplify right side
   2,713.55x = 4,356,339.87
5. Step 5: Solve for x
   x = 4,356,339.87/2,713.55
6. Step 6: Final answer
   x = 1,605.40