Finding the Fourth Proportional to 1,656.68, 2,483.12 and 681.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,656.68 : 2,483.12 = 681.57 : x
2. Step 2: Convert to fraction form
   1,656.68/2,483.12 = 681.57/x
3. Step 3: Cross multiply
   1,656.68x = 2,483.12 × 681.57
4. Step 4: Simplify right side
   1,656.68x = 1,692,416.69
5. Step 5: Solve for x
   x = 1,692,416.69/1,656.68
6. Step 6: Final answer
   x = 1,021.57