Finding the Third Proportional to 1,215,198.75 and 2,659,141.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,198.75 : 2,659,141.50 = 2,659,141.50 : x
2. Step 2: Convert to fraction form
   1,215,198.75/2,659,141.50 = 2,659,141.50/x
3. Step 3: Cross multiply
   1,215,198.75x = 2,659,141.50 × 2,659,141.50
4. Step 4: Simplify right side
   1,215,198.75x = 7,071,033,517,022.25
5. Step 5: Solve for x
   x = 7,071,033,517,022.25/1,215,198.75
6. Step 6: Final answer
   x = 5,818,828.83