Finding the Fourth Proportional to 1,077.86, 1,485.86 and 762.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.86 : 1,485.86 = 762.09 : x
2. Step 2: Convert to fraction form
   1,077.86/1,485.86 = 762.09/x
3. Step 3: Cross multiply
   1,077.86x = 1,485.86 × 762.09
4. Step 4: Simplify right side
   1,077.86x = 1,132,355.24
5. Step 5: Solve for x
   x = 1,132,355.24/1,077.86
6. Step 6: Final answer
   x = 1,050.56