Finding the Third Proportional to 1,290.56 and 2,051.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.56 : 2,051.06 = 2,051.06 : x
2. Step 2: Convert to fraction form
   1,290.56/2,051.06 = 2,051.06/x
3. Step 3: Cross multiply
   1,290.56x = 2,051.06 × 2,051.06
4. Step 4: Simplify right side
   1,290.56x = 4,206,857.38
5. Step 5: Solve for x
   x = 4,206,857.38/1,290.56
6. Step 6: Final answer
   x = 3,259.71