Finding the Fourth Proportional to 1,867.05, 2,799.46 and 770.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.05 : 2,799.46 = 770.82 : x
2. Step 2: Convert to fraction form
   1,867.05/2,799.46 = 770.82/x
3. Step 3: Cross multiply
   1,867.05x = 2,799.46 × 770.82
4. Step 4: Simplify right side
   1,867.05x = 2,157,870.22
5. Step 5: Solve for x
   x = 2,157,870.22/1,867.05
6. Step 6: Final answer
   x = 1,155.76