Finding the Fourth Proportional to 1,074.60, 1,483.20 and 681.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.60 : 1,483.20 = 681.57 : x
2. Step 2: Convert to fraction form
   1,074.60/1,483.20 = 681.57/x
3. Step 3: Cross multiply
   1,074.60x = 1,483.20 × 681.57
4. Step 4: Simplify right side
   1,074.60x = 1,010,904.62
5. Step 5: Solve for x
   x = 1,010,904.62/1,074.60
6. Step 6: Final answer
   x = 940.73