Finding the Fourth Proportional to 1,355.38, 1,870.35 and 765.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.38 : 1,870.35 = 765.94 : x
2. Step 2: Convert to fraction form
   1,355.38/1,870.35 = 765.94/x
3. Step 3: Cross multiply
   1,355.38x = 1,870.35 × 765.94
4. Step 4: Simplify right side
   1,355.38x = 1,432,575.88
5. Step 5: Solve for x
   x = 1,432,575.88/1,355.38
6. Step 6: Final answer
   x = 1,056.96