Finding the Fourth Proportional to 1,355.01, 1,869.91 and 765.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.01 : 1,869.91 = 765.54 : x
2. Step 2: Convert to fraction form
   1,355.01/1,869.91 = 765.54/x
3. Step 3: Cross multiply
   1,355.01x = 1,869.91 × 765.54
4. Step 4: Simplify right side
   1,355.01x = 1,431,490.90
5. Step 5: Solve for x
   x = 1,431,490.90/1,355.01
6. Step 6: Final answer
   x = 1,056.44