Finding the Fourth Proportional to 1,551.38, 2,326.46 and 770.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.38 : 2,326.46 = 770.81 : x
2. Step 2: Convert to fraction form
   1,551.38/2,326.46 = 770.81/x
3. Step 3: Cross multiply
   1,551.38x = 2,326.46 × 770.81
4. Step 4: Simplify right side
   1,551.38x = 1,793,243.15
5. Step 5: Solve for x
   x = 1,793,243.15/1,551.38
6. Step 6: Final answer
   x = 1,155.91