Finding the Third Proportional to 691,141.50 and 1,081,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   691,141.50 : 1,081,858.50 = 1,081,858.50 : x
2. Step 2: Convert to fraction form
   691,141.50/1,081,858.50 = 1,081,858.50/x
3. Step 3: Cross multiply
   691,141.50x = 1,081,858.50 × 1,081,858.50
4. Step 4: Simplify right side
   691,141.50x = 1,170,417,814,022.25
5. Step 5: Solve for x
   x = 1,170,417,814,022.25/691,141.50
6. Step 6: Final answer
   x = 1,693,456.14