Finding the Fourth Proportional to 1,360.17, 1,876.78 and 770.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.17 : 1,876.78 = 770.59 : x
2. Step 2: Convert to fraction form
   1,360.17/1,876.78 = 770.59/x
3. Step 3: Cross multiply
   1,360.17x = 1,876.78 × 770.59
4. Step 4: Simplify right side
   1,360.17x = 1,446,231.21
5. Step 5: Solve for x
   x = 1,446,231.21/1,360.17
6. Step 6: Final answer
   x = 1,063.27