Finding the Third Proportional to 708,961.50 and 1,089,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   708,961.50 : 1,089,724.50 = 1,089,724.50 : x
2. Step 2: Convert to fraction form
   708,961.50/1,089,724.50 = 1,089,724.50/x
3. Step 3: Cross multiply
   708,961.50x = 1,089,724.50 × 1,089,724.50
4. Step 4: Simplify right side
   708,961.50x = 1,187,499,485,900.25
5. Step 5: Solve for x
   x = 1,187,499,485,900.25/708,961.50
6. Step 6: Final answer
   x = 1,674,984.45