Finding the Fourth Proportional to 2,061.59, 3,085.20 and 1,687.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.59 : 3,085.20 = 1,687.07 : x
2. Step 2: Convert to fraction form
   2,061.59/3,085.20 = 1,687.07/x
3. Step 3: Cross multiply
   2,061.59x = 3,085.20 × 1,687.07
4. Step 4: Simplify right side
   2,061.59x = 5,204,956.08
5. Step 5: Solve for x
   x = 5,204,956.08/2,061.59
6. Step 6: Final answer
   x = 2,524.73