Finding the Third Proportional to 1,298.81 and 2,660.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.81 : 2,660.06 = 2,660.06 : x
2. Step 2: Convert to fraction form
   1,298.81/2,660.06 = 2,660.06/x
3. Step 3: Cross multiply
   1,298.81x = 2,660.06 × 2,660.06
4. Step 4: Simplify right side
   1,298.81x = 7,075,932.50
5. Step 5: Solve for x
   x = 7,075,932.50/1,298.81
6. Step 6: Final answer
   x = 5,448.00