Finding the Fourth Proportional to 1,355.41, 1,870.47 and 765.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.41 : 1,870.47 = 765.94 : x
2. Step 2: Convert to fraction form
   1,355.41/1,870.47 = 765.94/x
3. Step 3: Cross multiply
   1,355.41x = 1,870.47 × 765.94
4. Step 4: Simplify right side
   1,355.41x = 1,432,667.79
5. Step 5: Solve for x
   x = 1,432,667.79/1,355.41
6. Step 6: Final answer
   x = 1,057.00