Finding the Third Proportional to 1,039.92 and 1,360.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.92 : 1,360.76 = 1,360.76 : x
2. Step 2: Convert to fraction form
   1,039.92/1,360.76 = 1,360.76/x
3. Step 3: Cross multiply
   1,039.92x = 1,360.76 × 1,360.76
4. Step 4: Simplify right side
   1,039.92x = 1,851,661.82
5. Step 5: Solve for x
   x = 1,851,661.82/1,039.92
6. Step 6: Final answer
   x = 1,780.58