Finding the Fourth Proportional to 1,360.32, 1,877.10 and 770.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.32 : 1,877.10 = 770.88 : x
2. Step 2: Convert to fraction form
   1,360.32/1,877.10 = 770.88/x
3. Step 3: Cross multiply
   1,360.32x = 1,877.10 × 770.88
4. Step 4: Simplify right side
   1,360.32x = 1,447,018.85
5. Step 5: Solve for x
   x = 1,447,018.85/1,360.32
6. Step 6: Final answer
   x = 1,063.73