Finding the Fourth Proportional to 1,370.18, 1,890.73 and 772.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.18 : 1,890.73 = 772.82 : x
2. Step 2: Convert to fraction form
   1,370.18/1,890.73 = 772.82/x
3. Step 3: Cross multiply
   1,370.18x = 1,890.73 × 772.82
4. Step 4: Simplify right side
   1,370.18x = 1,461,195.89
5. Step 5: Solve for x
   x = 1,461,195.89/1,370.18
6. Step 6: Final answer
   x = 1,066.43