Finding the Fourth Proportional to 2,520.12, 3,781.72 and 1,720.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.12 : 3,781.72 = 1,720.52 : x
2. Step 2: Convert to fraction form
   2,520.12/3,781.72 = 1,720.52/x
3. Step 3: Cross multiply
   2,520.12x = 3,781.72 × 1,720.52
4. Step 4: Simplify right side
   2,520.12x = 6,506,524.89
5. Step 5: Solve for x
   x = 6,506,524.89/2,520.12
6. Step 6: Final answer
   x = 2,581.83