Finding the Fourth Proportional to 1,851.90, 2,778.94 and 682.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.90 : 2,778.94 = 682.72 : x
2. Step 2: Convert to fraction form
   1,851.90/2,778.94 = 682.72/x
3. Step 3: Cross multiply
   1,851.90x = 2,778.94 × 682.72
4. Step 4: Simplify right side
   1,851.90x = 1,897,238.40
5. Step 5: Solve for x
   x = 1,897,238.40/1,851.90
6. Step 6: Final answer
   x = 1,024.48