Finding the Fourth Proportional to 1,868.70, 2,802.83 and 772.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.70 : 2,802.83 = 772.94 : x
2. Step 2: Convert to fraction form
   1,868.70/2,802.83 = 772.94/x
3. Step 3: Cross multiply
   1,868.70x = 2,802.83 × 772.94
4. Step 4: Simplify right side
   1,868.70x = 2,166,401.54
5. Step 5: Solve for x
   x = 2,166,401.54/1,868.70
6. Step 6: Final answer
   x = 1,159.31