Finding the Fourth Proportional to 2,069.86, 3,104.46 and 1,720.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.86 : 3,104.46 = 1,720.70 : x
2. Step 2: Convert to fraction form
   2,069.86/3,104.46 = 1,720.70/x
3. Step 3: Cross multiply
   2,069.86x = 3,104.46 × 1,720.70
4. Step 4: Simplify right side
   2,069.86x = 5,341,844.32
5. Step 5: Solve for x
   x = 5,341,844.32/2,069.86
6. Step 6: Final answer
   x = 2,580.78