Finding the Fourth Proportional to 1,868.27, 2,802.17 and 772.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.27 : 2,802.17 = 772.49 : x
2. Step 2: Convert to fraction form
   1,868.27/2,802.17 = 772.49/x
3. Step 3: Cross multiply
   1,868.27x = 2,802.17 × 772.49
4. Step 4: Simplify right side
   1,868.27x = 2,164,648.30
5. Step 5: Solve for x
   x = 2,164,648.30/1,868.27
6. Step 6: Final answer
   x = 1,158.64