Finding the Fourth Proportional to 1,360.28, 1,877.32 and 770.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.28 : 1,877.32 = 770.82 : x
2. Step 2: Convert to fraction form
   1,360.28/1,877.32 = 770.82/x
3. Step 3: Cross multiply
   1,360.28x = 1,877.32 × 770.82
4. Step 4: Simplify right side
   1,360.28x = 1,447,075.80
5. Step 5: Solve for x
   x = 1,447,075.80/1,360.28
6. Step 6: Final answer
   x = 1,063.81