Finding the Fourth Proportional to 1,682.51, 2,520.42 and 1,315.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,682.51 : 2,520.42 = 1,315.58 : x
2. Step 2: Convert to fraction form
   1,682.51/2,520.42 = 1,315.58/x
3. Step 3: Cross multiply
   1,682.51x = 2,520.42 × 1,315.58
4. Step 4: Simplify right side
   1,682.51x = 3,315,814.14
5. Step 5: Solve for x
   x = 3,315,814.14/1,682.51
6. Step 6: Final answer
   x = 1,970.75