Finding the Fourth Proportional to 2,570.74, 3,543.90 and 1,685.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.74 : 3,543.90 = 1,685.00 : x
2. Step 2: Convert to fraction form
   2,570.74/3,543.90 = 1,685.00/x
3. Step 3: Cross multiply
   2,570.74x = 3,543.90 × 1,685.00
4. Step 4: Simplify right side
   2,570.74x = 5,971,480.36
5. Step 5: Solve for x
   x = 5,971,480.36/2,570.74
6. Step 6: Final answer
   x = 2,322.87