Finding the Fourth Proportional to 1,061.82, 1,591.42 and 770.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.82 : 1,591.42 = 770.33 : x
2. Step 2: Convert to fraction form
   1,061.82/1,591.42 = 770.33/x
3. Step 3: Cross multiply
   1,061.82x = 1,591.42 × 770.33
4. Step 4: Simplify right side
   1,061.82x = 1,225,918.57
5. Step 5: Solve for x
   x = 1,225,918.57/1,061.82
6. Step 6: Final answer
   x = 1,154.54