Finding the Third Proportional to 1,080.56 and 1,190.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.56 : 1,190.81 = 1,190.81 : x
2. Step 2: Convert to fraction form
   1,080.56/1,190.81 = 1,190.81/x
3. Step 3: Cross multiply
   1,080.56x = 1,190.81 × 1,190.81
4. Step 4: Simplify right side
   1,080.56x = 1,418,034.41
5. Step 5: Solve for x
   x = 1,418,034.41/1,080.56
6. Step 6: Final answer
   x = 1,312.31