Finding the Fourth Proportional to 1,945.25, 2,916.69 and 775.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.25 : 2,916.69 = 775.43 : x
2. Step 2: Convert to fraction form
   1,945.25/2,916.69 = 775.43/x
3. Step 3: Cross multiply
   1,945.25x = 2,916.69 × 775.43
4. Step 4: Simplify right side
   1,945.25x = 2,261,685.28
5. Step 5: Solve for x
   x = 2,261,685.28/1,945.25
6. Step 6: Final answer
   x = 1,162.67