Finding the Fourth Proportional to 1,360.39, 1,877.27 and 770.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.39 : 1,877.27 = 770.91 : x
2. Step 2: Convert to fraction form
   1,360.39/1,877.27 = 770.91/x
3. Step 3: Cross multiply
   1,360.39x = 1,877.27 × 770.91
4. Step 4: Simplify right side
   1,360.39x = 1,447,208.14
5. Step 5: Solve for x
   x = 1,447,208.14/1,360.39
6. Step 6: Final answer
   x = 1,063.82